Exit velocity is how fast the ball is moving off the bat, measured in miles per hour. It's one of the clearest signals for how hard a guy actually hits the ball. Baseball Savant tracks it on every batted ball in the majors, and once you know how to read it, you start seeing hitters differently than batting average ever lets you.
What exactly is exit velocity?
Exit velocity is the speed of the baseball the instant it leaves the bat, tracked by Statcast's radar and camera system installed in every MLB park. It replaced guesswork about "loud contact" with an actual number. A routine grounder might leave the bat at 75 mph. A scorched line drive can hit 110-115 mph. League average sits around 88-89 mph in a given season, according to Baseball Savant.
The number matters because it separates hard contact from lucky contact. A bloop single that lands in the wrong spot is still weak contact, even though it counts as a hit. A line drive right at a shortstop is still hard contact, even though it's an out. Batting average can't tell those two events apart. Exit velocity can.
Why does exit velocity matter more than batting average?
Exit velocity matters more than batting average because it measures the process, how hard you hit the ball, instead of the outcome, whether that particular ball found a gap. Batting average is noisy over a season. A guy can run a .310 average on a bunch of seeing-eye singles, then regress hard the next year because the underlying contact quality was never really there.
Take Giancarlo Stanton. He's posted some of the highest average exit velocities Statcast has ever tracked, north of 95 mph in his peak seasons, per Baseball Savant's player page. Even in years when injuries or bad luck dragged his average down, his exit velo numbers showed the underlying skill hadn't gone anywhere. Exit velocity is sticky. Batting average isn't.
Same idea as why shooting percentage alone is misleading in basketball. A single-number outcome stat hides the quality of the process behind it. Exit velocity is baseball's version of digging past the box score.
What counts as a "hard hit" ball?
A hard-hit ball is any batted ball with an exit velocity of 95 mph or higher. That threshold isn't arbitrary. MLB and Statcast landed on 95 mph because it's the point where batted balls start turning into hits and extra-base hits at a noticeably higher rate than everything below it.
Hard-hit rate, the percentage of a hitter's batted balls that clear 95 mph, has become one of the stickiest, most predictive numbers in the sport. Aaron Judge has posted some of the highest hard-hit rates in the league in recent seasons, frequently sitting above 55%, according to Baseball Savant's percentile rankings. More than half the balls he puts in play get hit about as hard as physically possible. That's not luck. That's a hitter doing damage on contact, over and over.
Compare that to a contact-oriented hitter with a low strikeout rate but a hard-hit rate in the 25-30% range. He might still hit for a solid average by putting the bat on the ball, but he isn't doing the same kind of damage, and it shows up in his slugging numbers over time.
How does exit velocity connect to barrels and launch angle?
A "barrel" is Statcast's term for the combination of exit velocity and launch angle that produces the best possible outcomes, and you need both to get there. A ball crushed at 105 mph but hit straight into the ground is just a hard groundout. A ball lofted at a perfect 25-degree angle but only traveling 80 mph is a routine flyout.
The sweet spot is exit velocity in the high 90s or above paired with a launch angle roughly between 8 and 32 degrees. When both line up, that's a barreled ball, and barreled balls turn into hits, often extra-base hits, at an extremely high rate. Statcast's barrel data is why teams talk about quality of contact instead of just batting average when evaluating a hitter's real offensive value, the same way teams lean on a single efficiency number to summarize a basketball player's overall impact.
It's also why some hitters with modest exit velocity numbers still produce real power. They've dialed in their launch angle to consistently find that sweet spot, squeezing more out of contact that isn't necessarily the hardest in the league.
Can a hitter improve their exit velocity?
Yes, but it's slow, and it comes down to strength, bat speed, and swing mechanics rather than something a hitter can flip on overnight. Bat speed is the single biggest driver of exit velocity. Statcast started tracking bat speed directly in 2023, and the link between how fast a bat moves through the zone and how hard the ball comes off it is strong and obvious.
Young hitters tend to add exit velocity as they get stronger and refine their swing path in their early-to-mid twenties, then that number tends to plateau. It's part of why prospects who show plus raw power in the minors, tracked in exit velocity readings during batting practice and games, get so much attention from scouts. Swing decisions, chasing pitches out of the zone, missing pitches to drive, matter too. But even a perfect swing decision on a good pitch doesn't produce a hard-hit ball if the underlying bat speed isn't there.
FAQ
What is a good exit velocity in MLB?
Anything above 90 mph on average is solid, and elite hitters typically average 91-93 mph or higher across a full season. League average sits around 88-89 mph, so a couple miles per hour above that is a real, meaningful gap in performance.
Does exit velocity predict future performance?
Yes. Exit velocity and hard-hit rate predict a hitter's future production better than batting average or even home run totals in a given year. Because they measure process instead of outcome, they're less affected by short-term luck, which is exactly why analysts lean on them so heavily when projecting a hitter going forward.
Where can I find a player's exit velocity stats?
Baseball Savant is the standard public source, with individual player pages showing average exit velocity, hard-hit rate, barrel rate, and percentile rankings against the rest of the league, all pulled straight from Statcast's tracking data.
Once you start looking at exit velocity instead of just batting average, you start predicting breakouts and regressions before they show up in the stat line. If you want to test that instinct against real games and real lines, Download GAGE and see how your read on a hitter stacks up.