The tension between raw talent and the cold reality of Major League Baseball statistics is a familiar rhythm for any pitcher transitioning to a new environment. For Roki Sasaki, the Los Angeles Dodgers’ high-profile right-hander, Saturday’s outing at Dodger Stadium wasn't defined by a masterpiece performance, but by a quiet, technical evolution. In the Dodgers’ 12-4 win over the Chicago Cubs on April 25, 2026, Sasaki’s line—five innings, five strikeouts, and four runs allowed on seven hits—did little to jump off the box score. Yet, behind those numbers lies a recalibration of his most lethal weapon: the splitter.
Engineering a New Velocity
The narrative surrounding Sasaki’s debut season in Los Angeles has been one of adaptation. Working closely with pitching coaches Mark Prior and Connor McGuinness, Sasaki has been hunting for a more sustainable way to deploy his signature pitch. The adjustment was subtle but distinct: an increase in velocity on the splitter, designed to generate sharper rotation and a more unpredictable break.
For a pitcher whose command has been a frequent subject of debate, the shift represents a departure from his usual approach. "My splitter had a better command," Sasaki noted following the game. "Mechanically, I also started feeling better." This isn't just about throwing harder; it is about finding a mechanical baseline that allows him to trust his stuff in high-leverage counts.
The Catcher’s Perspective on Efficiency
Catcher Dalton Rushing, who has been behind the plate for every one of Sasaki’s starts this season except for a lone outing against the Colorado Rockies, has a unique vantage point on this evolution. Rushing argues that the previous reliance on a slower splitter—typically landing in the 84-86 mph range—was a liability that made command difficult to maintain. By bumping the velocity, Sasaki is moving toward a more efficient, zone-attacking profile.
"I think it’s gonna work for him over the course of the whole season," Rushing said. "It was around the zone. It was in the zone, early in the count, and that alone is a little bit of a difference from the past." The goal, according to Rushing, was simple: secure strike one within the first two pitches. While the pair admitted to some growing pains—specifically regarding two-strike splitters that were overexposed—the tactical shift is already yielding measurable changes in how Sasaki controls the count.
Navigating a Challenging April
Sasaki’s introduction to the Dodgers' rotation has been statistically turbulent. Through four starts in April, he has surrendered 15 earned runs across 18.2 innings, battling a persistent issue with the long ball that has resulted in eight home runs. His best effort to date remains his season opener against the Cleveland Guardians, where he struck out four over four innings while allowing only one run, a game lost due to a lack of offensive support.
When a player of Sasaki’s pedigree joins a championship-caliber clubhouse, the pressure to produce immediately is immense. His current strikeout rate—18 strikeouts in those 18.2 innings—suggests the swing-and-miss ability is present, but the efficiency gap remains the primary hurdle. Whether this mechanical refinement can suppress the home run rate and stabilize his outings will be the defining story of his spring. As the Dodgers look toward their upcoming road trip against the St. Louis Cardinals, the continued development of his splitter will be the primary signal to watch to determine if Sasaki is finally finding his footing in the National League.
