​
​
Sign In
  • Support FanGraphs
    FanGraphs Membership
    FanGraphs Shirts
    FanGraphs Mugs
    Gift a Membership
    Donate to FanGraphs
  • Fantasy
    Fantasy Tools
    Fantasy Player Rater
    Auction Calculator
    Ottoneu Fantasy Baseball
    Signup, FAQ, Blog Posts
  • Blogs
    Blog Roll

    FanGraphs
      Podcasts: Effectively Wild

      FanGraphs Prospects

      RotoGraphs
        Podcasts: The Sleeper and The Bust | Field of Streams | Beat the Shift

        Community Research

          Archived Blogs: The Hardball Times | NotGraphs | TechGraphs | FanGraphs+
          Archived THT: THT Live | Dispatch | Fantasy | ShysterBall
          Archived Podcasts: FanGraphs Audio | Chin Music | UMP: The Untitled McDongenhagen Project | Stealing Home | Doing It For Bartolo | OttoGraphs |
        • Projections
          2025 Pre-Season Projections
          ZiPS, ZiPS DC
          Steamer
          Depth Charts
          ATC
          THE BAT, THE BAT X
          OOPSY
          2025 600 PA / 200 IP Projections
          Steamer600, Steamer600 (Update)
          2025 Updated In-Season Projections
          ZiPS (RoS), ZiPS (Update), ZiPS DC (RoS)
          Steamer (RoS), Steamer (Update)
          Depth Charts (RoS)
          ATC DC (RoS)
          THE BAT (RoS), THE BAT X (RoS)
          OOPSY DC (RoS)
          3-Year Projections
          ZiPS 2026, ZiPS 2027
          On-Pace Leaders
          Every Game Played, Games Played %
          Cy Young Award Projections

          Auction Calculator
        • Scores
          Today
          Live Scoreboard, Probable Pitchers
          Live Daily Leaderboards
          Win Probability & Box Scores
          2025, 2024, 2023, 2022, 2021, 2020, 2019
          AL Games
          NL Games
        • Standings
          2025 Projected Standings
          2025 Playoff Odds, Playoff Odds Graphs
          2024 ZiPS Postseason Game-By-Game Odds
          AL East
          AL Central
          AL West
          NL East
          NL Central
          NL West
        • Leaders
          Major League Leaders
          Batting: 2025, 2024, 2023, 2022, 2021, Career
          Pitching: 2025, 2024, 2023, 2022, 2021, Career
          Fielding: 2025, 2024, 2023, 2022, 2021, Career
          Major League Leaders - Rank
          Batting: Ranking Grid, Compare Players, Compare Stats
          Pitching: Ranking Grid, Compare Players, Compare Stats
          Splits Leaderboards
          Pitch-Type Splits Leaderboards
          Season Stat Grid

          Postseason Leaders
          Batting: 2024, (WS), (LCS), (LDS), (WCS), Career
          Pitching: 2024, (WS), (LCS), (LDS), (WCS), Career

          Spring Training Leaders
          Batting: 2025, 2024, 2023
          Pitching: 2025, 2024, 2023

          KBO Leaders
          Batting, Pitching
          NPB Leaders
          Batting, Pitching

          Minor League Leaders
          AAA: International League, Pacific Coast League
          AA: Eastern League, Southern League, Texas League
          A+: Midwest League, South Atlantic League, Northwest League
          A: California League, Carolina League, Florida State League
          CPX: Arizona, Florida
          R: Dominican Summer League
          College Leaders
          Batting, Pitching

          WAR Tools
          Combined WAR Leaderboards
          WAR Graphs
          WPA Tools
          WPA Inquirer
          Rookie Leaders
          Batters 2025, Pitchers 2025
          Splits Leaders
          Batters: vs L, vs R, Home, Away
          Pitchers: vs L, vs R, Home, Away
        • Teams
          Team Batting Stats
          2025, 2024, 2023, 2022, 2021, 2020
          Team Pitching Stats
          2025, 2024, 2023, 2022, 2021, 2020
          Team WAR Totals (RoS)
          AL East
          Blue Jays  |  DC
          Orioles  |  DC
          Rays  |  DC
          Red Sox  |  DC
          Yankees  |  DC
          AL Central
          Guardians  |  DC
          Royals  |  DC
          Tigers  |  DC
          Twins  |  DC
          White Sox  |  DC
          AL West
          Angels  |  DC
          Astros  |  DC
          Athletics  |  DC
          Mariners  |  DC
          Rangers  |  DC
          NL East
          Braves  |  DC
          Marlins  |  DC
          Mets  |  DC
          Nationals  |  DC
          Phillies  |  DC
          NL Central
          Brewers  |  DC
          Cardinals  |  DC
          Cubs  |  DC
          Pirates  |  DC
          Reds  |  DC
          NL West
          D-backs  |  DC
          Dodgers  |  DC
          Giants  |  DC
          Padres  |  DC
          Rockies  |  DC
          Positional Depth Charts
          Batters: C, 1B, 2B, SS, 3B, LF, CF, RF, DH
          Pitchers: SP, RP
        • RosterResource
          Current Depth Charts
          AL East
          Blue Jays
          Orioles
          Rays
          Red Sox
          Yankees
          AL Central
          Guardians
          Royals
          Tigers
          Twins
          White Sox
          AL West
          Angels
          Astros
          Athletics
          Mariners
          Rangers
          NL East
          Braves
          Marlins
          Mets
          Nationals
          Phillies
          NL Central
          Brewers
          Cardinals
          Cubs
          Pirates
          Reds
          NL West
          D-backs
          Dodgers
          Giants
          Padres
          Rockies
          In-Season Tools
          2025 Closer Depth Chart
          2025 Injury Report
          2025 Payroll Pages
          2025 Transaction Tracker
          2025 Schedule Grid
          2025 Probables Grid
          2025 Lineup Tracker
          2025 Minor League Power Rankings
          Offseason Tools
          2025 Free Agent Tracker
          2025 Offseason Tracker
          2025 Opening Day Tracker
        • Prospects
          Prospects Home
          The Board
          The Board: Scouting + Stats!
          How To Use The Board: A Tutorial
          Farm System Rankings

          Top Prospects List
          20252024
          AL
          BALCHWATH
          BOSCLEHOU
          NYYDETLAA
          TBRKCRSEA
          TORMINTEX
          NL
          ATLCHCARI
          MIACINCOL
          NYMMILLAD
          PHIPITSDP
          WSNSTLSFG
          2025 Preseason Top 100
        • Glossary
          Library
          Batting Stats
          wOBA, wRC+, ISO, K% & BB%, more...
          Pitching Stats
          FIP, xFIP, BABIP, K/9 & BB/9, more...
          Defensive Stats
          UZR Primer, DRS, FSR, TZ & TZL, more...
          More
          WAR, UBR Primer, WPA, LI, Clutch
          Guts!
          Seasonal Constants
          Park Factors
          Park Factors by Handedness
        • Sign In
        • Intro
        • Features
        • Offense
          • Complete List (Offense)
          • OBP
          • OPS and OPS+
          • wOBA
          • wRC and wRC+
          • wRAA
          • Off
          • BsR
          • UBR
          • wSB
          • wGDP
          • BABIP
          • ISO
          • HR/FB
          • Spd
          • Pull%/Cent%/Oppo%
          • Soft%/Med%/Hard%
          • GB%, LD%, FB%
          • K% and BB%
          • Plate Discipline (O-Swing%, Z-Swing%, etc.)
          • Pitch Type Linear Weights
          • Pace
        • Defense
          • Overview
          • Def
          • UZR
          • DRS
          • Defensive Runs Saved – 2020 Update
          • Inside Edge Fielding
          • Catcher Defense
          • FSR
          • RZR
          • TZ / TZL
        • Pitching
          • Complete List (Pitching)
          • PitchingBot Pitch Modeling Primer
          • Stuff+, Location+, and Pitching+ Primer
          • ERA
          • WHIP
          • FIP
          • xFIP
          • SIERA
          • Strikeout and Walk Rates
          • Pull%/Cent%/Oppo%
          • Soft%/Med%/Hard%
          • GB%, LD%, FB%
          • BABIP
          • HR/FB
          • LOB%
          • Pitch Type Linear Weights
          • SD / MD
          • ERA- / FIP- / xFIP-
          • Plate Discipline (O-Swing%, Z-Swing%, etc.)
          • Pace
          • PITCHF/x
            • What is PITCHF/x?
            • Pitch Type Abbreviations & Classifications
            • Heat Maps
            • Common Mistakes
            • PITCHf/x Resources
        • WE/RE/LI
          • RE24
          • Win Expectancy
          • WPA
          • LI
          • WPA/LI
          • Clutch
        • Principles
          • DIPS
          • Regression toward the Mean
          • Replacement Level
          • Sample Size
          • Splits
          • Projection Systems
          • Linear Weights
          • Counting vs. Rate Statistics
          • Park Factors
          • Park Factors – 5 Year Regressed
          • Positional Adjustment
          • Aging Curve
          • League Equivalencies
          • Pythagorean Win-Loss
          • Luck
        • WAR
          • What is WAR?
          • WAR for Position Players
          • WAR for Pitchers
          • FDP
          • fWAR, rWAR, and WARP
          • WAR Misconceptions
        • Business

        GB%, LD%, FB%

        by Piper Slowinski
        February 17, 2010

        Batted Ball Statistics are fairly straightforward: they express the share of a batter’s balls in play are line drives, ground balls, or fly balls. This includes balls that leave the park (home runs), so the sum of a batter’s batted ball statistics should be 100%. Major leaguers have a variety of swings, resulting in different batted ball profiles. Some batters hit lots of fly balls (typically power hitters), others put lots of balls on the ground (contact hitters), and many others fall somewhere in between.

        Infield pop-ups are also tracked on FanGraphs (IFFB%), and they are expressed as the percentage of pop-ups a batter hits out of their total number of fly balls. These numbers are generally small and fluctuate from year to year. They’re the worst batted ball type for batters, as they almost always lead to an out.

        Calculation:

        The statistics published on FanGraphs are drawn from data from Baseball Info Solutions (BIS) and reflect the share of a batter’s total balls in play that are of a certain type, classified as line drives, fly balls, and ground balls. Fly balls are also divided up between infield fly balls and total fly balls. To wit, the following are the formulas to calculate the percentages you can find on the site:

        Line Drive Percentage (LD%) = Line Drives / Balls in Play

        Fly Ball Percentage (FB%) = Fly Balls / Balls in Play

        Ground Ball Percentage (GB%) = Ground Balls / Balls in Play

        Infield Fly Ball Percentage (IFFB%) = Infield Fly Balls / Fly Balls

        Our batted ball data goes back to 2002, but it’s important to remember that there is no perfect way to define each type of batted ball so some balls that you might consider a fly balls might get classified as line drives and vice versa. In reality, batted balls exist on a continuous distribution from rolling perfectly on the ground to being launched straight up in the air. The cut points between the three classifications are somewhat arbitrary and imprecise, so do not treat the data as infallible.

        Why Batted Ball Stats:

        Batted ball stats are extremely useful for determining the type of hitter at which you’re looking. There is no ideal batted ball distribution, but batters who hit a lot of line drives typically perform better than hitters who hit lots of fly balls or ground balls. Generally speaking, line drives go for hits most often, ground balls go for hits more often than fly balls, and fly balls are more productive than ground balls when they do go for hits (i.e. extra base hits). Additionally, infield fly balls are essentially strikeouts and almost never result in hits or runner advancement. Here are the numbers from 2014:

        Type AVG ISO wOBA
        GB .239 .020 .220
        LD .685 .190 .684
        FB .207 .378 .335

        We use these stats to tell us two things. First, we want to get a sense of a batter’s swing or style of play. A big slugger hits lots of fly balls. A weak hitter probably hits a lot of ground balls. But more than descriptive information like that, batted ball data can be an indication of a hitter’s underlying performance.

        We often look at a hitter’s Batting Average on Balls in Play (BABIP) to make determinations about the sustainability of their performance and batted ball data informs that analysis in an important way. If a batter hits a lot of line drives, a high BABIP is more likely a function of his true talent than a hitter who hits a lot of fly balls, who has probably just been lucky in running that higher BABIP.

        Batted ball stats are a proxy for the nature of the batter’s swing. We know outcome metrics like wOBA are a good measure of value and performance, but they don’t tell us much about process. Batted ball data tells us something about process because the data isn’t a function of the defense. The data is admittedly binned into only three categories without any sort of velocity information, but it’s useful information if used properly.

        How to Use Batted Ball Stats:

        Batted ball statistics, like most statistics, should be used with caution for three key reasons. First, sample size is very important for the batted ball stat you likely care most about for hitters — line drive rate. While you can get a good sense of fly ball and ground ball rate with a month or two of data, it takes more like a year and a half for line drive rate to “stabilize.” All this means is that six weeks of batted ball data shouldn’t change your opinion of a player’s talent level.

        Second, batted ball classification is tricky. What’s the difference between a fly ball and a line drive? At what angle does one become the other? While BIS has a great team scouting each major league game, video data only offers only a certain level of detail. Even the most diligent stringer can’t get it right 100% of the time because they just don’t always have the proper angle to distinguish between a fly ball and line drive. When StatCast becomes fully operational, this problem should disappear because we will be able to use a simple numeric cut point.

        Finally, and most importantly, not all line drives/fly balls/ground balls are created equally. A pulled fly ball traveling at 105 mph to deep left field and one that lands harmlessly in the glove of the right fielder are extremely different. A screaming line drive up the game and one that’s easily caught by the shortstop are different. This is essentially another example of the data being a continuous (in launch angle, direction, and velocity) but presented as discrete data. A ball isn’t a fly ball or a line drive, it is hit at X launch angle, Y degrees from center, at Z velocity.

        Our categorization is helpful, but it is far from perfect. For example, in 2014, Brandon Crawford and Anthony Rizzo had very similar batted ball statistics, but Rizzo was clearly the better hitter overall as the quality of his contact within those categories was much better than Crawford’s.

        Essentially, use batted ball stats as a guide, not an anchor.

        Context:

        Please note that the following chart is meant as an estimate, and that league-average batted ball rates varies slightly on a year-by-year basis. To see the league-average batted ball breakdown for every year from 2002 to the present, check the FanGraphs leaderboards.

         Type League Average
        LD 21%
        GB 44%
        FB 35%
        IFFB 11%

        Power hitters will generally have higher fly ball rates (~44%), while contact hitters normally have high ground ball rates (50+%). And all hitters will hit their share of infield flies and they generally do not correlate that strongly from year to year.

        Things to Remember:

        ● A line drive produces 1.26 runs per out, while fly balls produce 0.13 runs per out and ground balls produce 0.05 runs per out. In other words, batters want to hit lots of line drives and fly balls, while pitchers generally want to cause batters to hit ground balls.

        ● Players that don’t hit many balls in the air (higher GB% with lower FB% and LD%) generally have higher BABIPs and batting averages, but have limited power.

        ● This data is tracked by Baseball Info. Solutions (BIS), which is why it’s only available for players back until 2002.

        ● GB/LD/FB% are calculated per ball in play.

        ● IFFB% is per fly ball.

        Links for Further Reading:

        BABIP: Slicing and Dicing Ground Ball Out Rates – Baseball Analysts

        Ground Balls and You – FanGraphs

        How Batted Ball Distance Ages – Hardball Times

        Redefining Batted Balls to Predict BABIP – Hardball Times

        Exploring Batted Ball Run Values and Spray – Hardball Times




        Principles
         
        GB%, LD%, FB%

        Piper was the editor-in-chief of DRaysBay and the keeper of the FanGraphs Library.

        Subscribe
        Login
        Notify of
        Please login to comment
        11 Comments
        Oldest
        Newest Most Voted
        Inline Feedbacks
        View all comments
        gnomez
        13 years ago

        Is there anywhere I could find results splits for batted ball types for individual batters (for example, what percentage of Albert Pujols’ line drives resulted in HR; what percentage of Josh Hamilton’s fly balls resulted in 2B)?

        0
        Deuce of Spades
        13 years ago

        Hi, I had a question about line drive %. I was under the impression that it correlated fairly strongly with BA, but it seems there are some guys like Bartlett and Pennington who have pretty high LD % and still don’t hit for much of an average. Can anyone explain why that is?

        0
        Piper Slowinski
        13 years ago
        Reply to  Deuce of Spades

        A couple reasons:

        1) Line drive rate is far from perfect. What’s the cutoff between a line drive and a looping fly ball? Weak hit bloopers are sometimes classified as “line drives”, so you have to keep in mind the data isn’t entirely perfect.

        2) There’s more to hitting for average than just line drives. Yeah, they typically fall in for hits more often than other hits, but you can’t ignore a player’s GB/FB ratio either. And BABIP plays into it a huge amount.

        Great question, thanks for asking!

        0
        Deuce of Spades
        13 years ago
        Reply to  Piper Slowinski

        Thanks for the answer Steve.

        0
        Dmanel
        13 years ago

        Am I missing something obvious, or is there a big difference between the production numbers cited here, and the ones in the linked Baseball Analyst article? (http://baseballanalysts.com/archives/2009/01/babip_slicing_a.php)

        Fangraphs:
        “- A line drive produces 1.26 runs/out, while fly balls produce .13 R/O and groundballs produce .05 R/O. In other words, batters want to hit lots of line drives and fly balls, while pitchers want to make batters hit groundballs.”

        Baseball Analyst:
        “However, when it comes to production, flyballs are more valuable than groundballs. To wit, including home runs, line drives produced .40 runs in 2007 and .39 in 2008, while the average outfield flyball yielded .18 runs in 2007 and 2008. Meanwhile, the average groundball generated .05 runs per event in 2007 and .04 in 2008.”

        The groundball run rates are exactly the same, but line drive numbers are way off. Is the ratio cited in fangraphs mistakenly the run production per/inning?

        Also, does anyone know where I can find the updated production numbers for 2011?

        Thanks in advance.

        0
        Dmanel
        13 years ago

        Sorry, the difference is obviously R/O vs. R/PA. I missed that.

        0
        EnricoPalazzo
        13 years ago

        While all line drives could be called “well-hit”, the ground balls and fly balls cannot be distinguished as such. Some ground balls dribble to the pitcher while others burn down the 3rd base line. Fly balls are similar. Is there a stat available here where you can see the amount of balls hit from say, -5 degrees to +40 degrees with the horizontal, and with a minimum velocity? Call it the GW%, for Good Wood %.

        0
        Luke
        12 years ago

        So what percentage of flyballs in play go for hits? groundballs? line drives? i know they even out to about 30% but im just curious what the league average is even though it may vary by hitter

        0
        danielschwartz.rotobanter
        12 years ago
        Reply to  Luke

        Luke,
        A while back (definitely not 2011 or 2012) i know the following:
        LD GB FB
        % turned into an out 26% 72% 79%
        % turned into a hit 74.00% 28.00% 21.00%

        I want to find this data for 2012 so that i can make my 2013 projections.

        As mentioned above, FB may cost more outs overall, but they are more valuable because naturally FB will lead to HR.

        0
        danielschwartz.rotobanter
        12 years ago
        Reply to  danielschwartz.rotobanter

        FYI i think this data was from 2004 (via THT): http://www.hardballtimes.com/main/article/groundballs-flyballs-and-line-drives/

        -Dan

        0
        danielschwartz.rotobanter
        12 years ago

        Does anyone have the data or can steer me toward the data for the following:
        What is the percentage of LD/GB/FB that became hits in 2012. In short, I am trying to project how many overall hits a player is expected to have based on this which will lead me to an expected average (versus trying to associated it to BABIP or other strategies). This can also help me with projecting HR totals obviously if I project/assume a HR/FB ratio.

        Thanks,
        Dan

        1
        You are going to send email to

        Move Comment

        Updated: Saturday, June 28, 2025 11:45 PM ETUpdated: 6/28/2025 11:45 PM ET
        @fangraphs - Contact Us - Advertise - Terms of Service - Privacy Policy
        sis_logo
        All major league baseball data including pitch type, velocity, batted ball location, and play-by-play data provided by Sports Info Solutions.
        mlb logo
        Major League and Minor League Baseball data provided by Major League Baseball.
        Mitchel Lichtman
        All UZR (ultimate zone rating) calculations are provided courtesy of Mitchel Lichtman.
        TangoTiger.com
        All Win Expectancy, Leverage Index, Run Expectancy, and Fans Scouting Report data licenced from TangoTiger.com
        Retrosheet.org
        Play-by-play data prior to 2002 was obtained free of charge from and is copyrighted by Retrosheet.