The Death of the Fastball

49% and Falling

In 2008, pitchers threw fastballs on nearly two out of every three pitches. Four-seamers and sinkers accounted for 65.2% of all pitches in Major League Baseball. By 2025, that number fell to 49.1%. For the first time in the sport's tracked history, fastballs are a minority pitch type.

The drop wasn't sudden. It moved at about one percentage point per year, steady enough to be invisible in any single season but unmistakable across a decade. The pitch that defined the sport for a century is now outpaced by the collective volume of sliders, cutters, changeups, curveballs, and sweepers.

What Replaced the Fastball

The fastball's lost share spread across the entire breaking-ball spectrum: slider usage doubled, cutters tripled, and sweepers went from a pitch nobody named to 7% of all pitches thrown.

The modern pitcher doesn't have a primary weapon. He has a portfolio.

The slider family is the story. What used to be a single pitch type splintered into sliders, sweepers, and cutters, each with different movement profiles, each exploiting different hitter weaknesses. The breaking-ball ecosystem grew more diverse while the fastball shrank toward extinction.

Hitters Got Too Good at Timing Velocity

The evolutionary pressure that killed the fastball came from the batter's box. Between 2015 and 2025, hitters improved their performance against fastballs while getting worse against breaking pitches. The numbers are unambiguous.

Three things converged to create this gap. First, bat speed data went mainstream. Hitters trained to catch up to velocity, and the tools to measure progress became widely available.

Second, average fastball velocity climbed from 91.5 mph to 94.1 mph across the same period. Pitchers threw harder, but hitters adapted faster. Third, high-speed video let hitters study pitch tunneling, and fastballs with predictable release points became easier to identify early in the pitch's flight.

The result: throwing hard stopped working as a standalone strategy. A 96 mph fastball with no deception is a below-average pitch in 2025. Velocity without shape is just a louder version of the same mistake.

Pitchers Throw Harder Than Ever but Use the Pitch Less

Average four-seam velocity in 2025 is 94.1 mph, up from 91.5 in 2008. Pitchers have never thrown faster. They've also never relied on the pitch less. This is the paradox: the fastball got better and less effective at the same time.

The table below shows how velocity percentiles shifted. What was dominant became ordinary. What was ordinary became replacement-level.

Every percentile shifted right by roughly 2.5 mph. The entire velocity distribution moved, but the relative advantage didn't change. A pitcher in the 75th percentile in 2008 (93.4 mph) threw about as hard as the 50th percentile pitcher in 2025 (94.1 mph). The fastball kept getting faster, and it kept mattering less.

The Pitches That Ate the Fastball's Share

Sliders gained 11.8 percentage points of total usage between 2008 and 2025. Cutters gained 7.7. The sweeper category, which wasn't tracked as a distinct pitch type until 2023, already sits at 7.1%. Together, the slider family accounts for 42.1% of all pitches. That's nearly as much as fastballs.

The shift happened because of Statcast. When pitch-tracking data became available to every organization, pitching coaches could quantify what made breaking balls effective: horizontal break, vertical approach angle, tunnel distance from the fastball. They could measure it, teach it, and optimize it. The fastball's decline is really a story about the breaking ball's enlightenment.

A 34.2% whiff rate on sliders versus 22.8% on fastballs tells the story in two numbers. Pitchers use breaking balls more because they miss more bats. The economics are straightforward.

Who Still Lives on the Fastball

Some pitchers bucked the trend. Not many. The ones who did share a specific profile: elite velocity (97+ mph), plus a ride metric above the 90th percentile in induced vertical break. Their fastballs don't play like everybody else's fastballs because the movement fools hitter timing even when the speed doesn't.

Negative run values are good for pitchers. Strider's fastball saved 18 runs above average in his last healthy season. The league average is zero by definition.

The gap between elite fastball pitchers and everyone else keeps widening. The fastball survives only for those who throw an exceptional one. For the other 90% of the league, the pitch has become a liability disguised as tradition.

The Fastball Becomes a Change of Pace

If the current trend holds, fastball usage will drop below 45% by 2028. The pitch that defined baseball for a century will function as a setup pitch in most arsenals. Pitchers will throw it to establish a speed ceiling, then attack with breaking balls below it. The fastball's role won't be to get outs. It will be to make sliders work.

That's a fundamental inversion. For most of baseball history, the breaking ball set up the fastball. The curveball existed to make the hitter less ready for heat. Now the heat exists to make the hitter less ready for the break. The hierarchy flipped, and the data says it's not flipping back.

Jesse Walker

Jesse Walker writes about baseball through data. He played outfield in high school, found his real position behind a spreadsheet, and hasn't stopped building models since.