Hardest Throwers in MLB 2026: Fastball Velocity Leaders
Mason Miller leads MLB in 2026 with a 101.3 mph average fastball — the only pitcher averaging triple digits across his outings this season. Edgardo Henriquez (100.2) is the only other pitcher above 100. Here are the hardest throwers in baseball, how Statcast measures fastball velocity, and why pure velocity has limits as a projection tool.
Who throws the hardest in MLB right now?
Mason Miller leads MLB in average fastball velocity at 101.3 mph, the only qualified pitcher averaging triple digits in 2026. Edgardo Henriquez follows at 100.2 mph — and that's the entire 100+ club for now. The next tier (Jacob Misiorowski 99.6, Adrian Morejon 99.4, Daniel Palencia 99.4) sits in the high-99s, with the rest of the top 10 between 98.7 and 98.9 mph. The full ranked list is on the 2026 MLB fastball velocity leaderboard, refreshed nightly from Baseball Savant. See all MLB Statcast leaderboards →
Two things stand out about this leaderboard: it's almost entirely relievers, and the gap between #1 and #10 is only about 2.5 mph. Relievers dominate because they pitch in short bursts and don't have to pace themselves the way starters do — most starters who average 98+ in the first inning are throwing 96 by the sixth. Mason Miller is the rare reliever who could fit either role; he's been used as both an opener and a high-leverage closer this year.
How is fastball velocity measured?
Fastball velocity is measured by MLB's Statcast system using Hawk-Eye optical tracking cameras installed in every ballpark since 2020. Statcast replaced the older TrackMan radar system that year. Each camera samples ball position at thousands of frames per second from the moment the ball leaves the pitcher's hand.
The figure published is the release-point velocity — the speed of the ball at the instant it separates from the pitcher's fingers, not the speed at home plate. That distinction matters: a 100 mph fastball loses roughly 8-9 mph in flight from release to the catcher's mitt due to air drag, so 100 mph at release is closer to 91 mph crossing the plate. Both numbers are tracked but the headline "velocity" stat always references release.
Statcast also distinguishes between fastball types. The "Fastball Velocity" leaderboard on Legends Deck filters for four-seam fastballs, the pitch most analysts mean when they say "fastball." Sinkers (two-seamers) and cutters are tracked on separate Baseball Savant pages and tend to come in 1-2 mph slower than four-seamers from the same pitcher.
Who has thrown the hardest single pitch in MLB history?
The single-pitch velocity record belongs to Aroldis Chapman at 105.8 mph, set in 2010 against the Padres. Chapman threw at least 26 pitches at 105+ mph during his career — more than every other MLB pitcher combined through the Statcast era. The active leader is Jordan Hicks at 105.0 mph (2018), and Mason Miller has touched 104 mph once or twice in 2026 but hasn't broken into the 105+ club.
Single-pitch records and season-long averages reward different skills. A 105 mph max is impressive, but a 101 mph season-long average like Mason Miller's is harder because it requires sustaining elite velocity across dozens of outings rather than peaking on one pitch with a fresh arm. The fastball velocity leaderboard uses the season-long average so endurance and consistency matter.
Why does velocity matter — and where does it stop mattering?
Velocity is the single best individual predictor of strikeout rate at the pitch level. A 99 mph fastball generates a whiff (a swing-and-miss) on roughly 28% of swings; a 92 mph fastball generates a whiff on roughly 16% of swings. That gap compounds across every plate appearance, which is why "throws 100" has become a shorthand for "high-strikeout pitcher" in modern baseball.
But velocity has hard limits as a complete-pitcher predictor:
Command matters more above 95 mph. Two pitchers throwing 99 are not equivalent — one who locates inside on the hands is a Cy Young candidate, one who throws 99 down the middle is an early-inning replacement. The whiff rate leaderboard surfaces pitchers who turn velocity into actual misses, which is what matters.
Pitch mix matters. Mason Miller's slider grades out as elite separately; he's not winning purely because of the fastball. Some of the biggest velocity names of the past decade (Hicks, Aroldis Chapman late-career) didn't sustain elite results because their secondary pitches couldn't generate whiffs on their own.
Injury risk. Pitching above 100 mph consistently has been linked to higher Tommy John surgery rates. Mason Miller has already had multiple IL stints in 2026; sustained elite velocity is partly a function of staying healthy enough to deliver it.
The shortest version: velocity tells you the upside, command and pitch mix tell you whether the upside actually materializes.
How does velocity translate to Legends Deck card ratings?
The "Velocity" attribute on every Legends Deck pitcher card is derived directly from real Statcast fastball release velocity, refreshed nightly from Baseball Savant. A 95 Velocity card maps to the 95th-percentile fastball velocity among qualified MLB pitchers. Mason Miller, Edgardo Henriquez, and Jacob Misiorowski are likely to carry top-tier Velocity ratings in the current set.
Velocity feeds the pitch simulation engine in Franchise Mode and PvP matchups — higher velocity yields higher per-pitch whiff probability, but the attribute is one of several inputs (Command, pitch-mix breadth, Stamina). A 99-velocity pitcher with low Command is still hittable in-game; the model mirrors the real-world tradeoffs above.
Browse the full card directory for current 2026 Velocity ratings, or jump to the fastball velocity leaderboard for the live ranked list of hardest throwers.