Roki Sasaki: A Rising Star Facing Early Challenges
As the 2023 MLB season unfolded, Roki Sasaki entered the spotlight with tremendous promise. Yet, despite his initial buzz, a closer look reveals troubling trends beneath his performance, as evidenced by his current ERA of 4.72 after just eight outings.
Key Factors Behind Sasaki’s Struggles
Several critical areas appear to be hindering Sasaki’s effectiveness on the mound:
Velocity Concerns
Sasaki dazzled Japanese fans with a fastball averaging between 98-99 mph, peaking at 101 mph in 2023. However, reports indicate a decline, with his 2024 average slipping to around 97 mph. Although his first start showcased his potential with a 100 mph pitch, subsequent games have seen a gradual dip, now averaging 96 mph.
Control Issues Plaguing Performance
Sasaki’s walk rate of 14% places him in the lower echelons of MLB pitchers, indicative of his struggle to command the zone. His pitch selection, which includes a 96 mph four-seamer, an 85 mph splitter, and an 82 mph slider, is hindered by a lack of control, particularly with the slider, which has failed to deceive hitters.
Pitch Effectiveness and Hitters’ Responses
An analysis of his pitch effectiveness shows a concerning trend: hitters are not chasing Sasaki’s offerings, leading to subpar results across the board. His chase rates fall below average, necessitating a shift towards more competitive in-zone pitches.
Inability to Finish Off Batters
One of the most significant hurdles for Sasaki is his inability to close out at-bats. His in-zone pitches lack the necessary bite to generate swings and misses, resulting in an alarming lack of weak contact or ground balls.
Predictability Against Right-Handed Hitters
As a right-handed pitcher, Sasaki’s performance against right-handed batters has not met expectations, with a FIP of 4.82. His predictability—relying heavily on his four-seamer—has made it easier for hitters to anticipate his offerings.
The Impact of Injury on Sasaki’s Performance
Recently, the Dodgers placed Sasaki on the injured list due to a shoulder impingement. While injuries can certainly impact performance, his underlying issues—velocity, control, and predictability—pose significant challenges for his return.
Jorge Polanco: A Bright Spot in Seattle
In contrast to Sasaki’s struggles, Jorge Polanco has emerged as a standout performer for the Seattle Mariners, boasting an impressive OPS of 1.021 through 34 games, despite battling health issues.
Polanco’s Switch-Hitting Success
Primarily hitting left-handed this season due to discomfort on the right side, Polanco’s performance against right-handed pitching has been remarkable. His career statistics indicate a notable preference and effectiveness as a lefty, with this season’s numbers reflecting his adaptability.
Mechanical Adjustments Leading to Improvement
Polanco’s swing mechanics have evolved, resulting in improved bat-to-ball skills and contact quality. His refined stance and load position have allowed him to generate higher exit velocities and make better contact, leading to a more productive season.
Final Thoughts on Performance Trends
While the Dodgers may experience temporary setbacks with Sasaki’s injury, the presence of capable pitchers like Tony Gonsolin and Clayton Kershaw keeps their rotation robust. Conversely, Polanco’s early success this season exemplifies how adjustments and situational awareness can lead to impressive performance, highlighting the unpredictable nature of baseball.