Ryan Rolison, a left-handed reliever claimed by the Chicago Cubs during the offseason, showed promising signs during his recent outing, suggesting he might become a pivotal contributor in the team’s bullpen. Rolison’s development caught attention following his debut season in the majors with the Colorado Rockies in 2025, where he struggled but gained valuable experience. The Cubs see him as a candidate to provide important depth, especially if he can maintain the improved velocity displayed in his latest appearance.
Velocity Surge Mirrors Past Cub Success
The Cubs have witnessed similar sudden growth in bullpen arms before, notably with Brad Keller’s breakout in relief. Keller’s fastball gained nearly four miles per hour in velocity between 2024 and 2025, helping him become a dominant reliever. Rolison’s recent fastball speeds may hint at comparable progress. After averaging just under 93 MPH on his four-seam fastball last year, Rolison’s fastball now consistently crosses the plate at over 95 MPH, peaking above 96 MPH in his latest outing. This notable increase suggests he could replicate Keller’s success as a high-velocity bullpen asset.
Versatility and Pitch Mix Enhance Rolison’s Value
Beyond increased velocity, Rolison’s arsenal includes two distinct breaking balls and a useful changeup, making him effective against both left-handed and right-handed hitters. His high three-quarter delivery allows him to generate movement on his pitches, which adds to his effectiveness. If he sustains this form, Rolison could become a flexible and valuable option for the Cubs, able to neutralize various hitters and fill multiple bullpen roles.
Roster Considerations and Future Role
While Rolison may not be an essential piece if the Cubs’ bullpen remains healthy at season start, he carries value because of his minor league options, allowing the team to keep him available without occupying a roster spot. Players like Caleb Thielbar and Hoby Milner currently hold the bulk of bullpen roles, but Rolison’s performance could position him as a strong third left-handed reliever, especially replacing what was lost when Drew Pomeranz departed in free agency. His growth gives the Cubs more flexibility in managing bullpen depth throughout the season.
Implications for the Cubs’ Playoff Ambitions
Rolison’s potential emergence adds an important dimension to the Cubs’ bullpen as they aim for a deep postseason run. If he can combine his newfound arm strength with improved command, he could evolve into a dependable high-leverage reliever. This would not only strengthen the bullpen’s overall quality but also provide financial efficiency, as the Cubs invested minimal resources to acquire him. The coming months will reveal whether Rolison can fully tap into this upside and contribute significantly to Chicago’s playoff push.
