The Mound as a Laboratory

Just one week into the 2026 MLB regular season, quiet revolutions are already underway on the mound. Every spring brings a wave of new pitch experiments, but few survive contact with real hitters. This year, however, a compelling set of new weapons has already emerged — some brand-new additions, others existing pitches so thoroughly overhauled they've become something else entirely.

Logan Gilbert Adds a Changeup to His Splitter

Seattle Mariners ace Logan Gilbert was already devastating with just his splitter. Now he's layered a changeup on top of it, giving him two wipeout offspeed pitches. The new changeup sits around 85 mph with 16 inches of horizontal movement — a completely different trajectory than his diving splitter.

Dylan Cease Finally Has a Real Changeup

Toronto Blue Jays starter Dylan Cease had long struggled to develop a usable changeup. His old version, a gimmicky mid-70s 'Bugs Bunny' pitch, was more novelty than weapon. This season, he's throwing a mid-80s changeup he's mixing in consistently through his first two starts — a significant step toward becoming a true multi-pitch pitcher.

Schlittler's Cutter: Faster and More Carry

After debuting a cutter as a rookie, Schlittler tweaked his grip this offseason. The result: a pitch averaging over 94 mph (up from 92 mph in 2025) with elite carry through the zone reminiscent of Kenley Jansen or peak Corbin Burnes.

Cristopher Sánchez Reshapes His Slider With One Finger

Phillies ace Cristopher Sánchez is now spiking his left index finger on his slider delivery. The result: four additional inches of drop with no velocity sacrifice (still 85-86 mph). A pitch that was already 2.5 inches above average in drop now falls five inches more than average.

Mark Leiter's Power Arsenal Gets a Cutter

After adding a sinker and kick changeup last year, 25-year-old fireballer Mark Leiter has added a cutter sitting at nearly 94 mph. Combined with his 97 mph fastball, 91 mph changeup, and 87 mph slider, it's a true power pitcher's arsenal.

Duran's Arsenal: Splinker Meets Split-Change

Phillies closer Seranthony Duran, inventor of the 'splinker' (a sinker/splitter hybrid reaching 100 mph), has added a 'split-change' — a splitter/changeup hybrid. His splinker averages 97 mph with 25 inches of drop; the new split-change comes in at 89 mph with 34 inches of drop. It's a genuine offspeed foil to his triple-digit heat.

Boyle Revives the Sweeper via Sidearm

Rays righty Boyle once threw a sweeper but scrapped it when he changed his arm angle. Now, that new sidearm delivery naturally suits a sweeper, so he's brought it back. The 6-foot-8 righty is sitting at 85 mph with 15 inches of glove-side break.

A League-Wide Trend

Pitch diversification is a defining trend of the Statcast era. As pitchers gain deeper insight into their own mechanics, the ability to add or reinvent pitches mid-career has never been greater. Whether these new weapons hold up against big-league hitters — and how batters adapt — will be one of the defining storylines of the 2026 season.