While Justin Slaten had an impressive rookie season, his ability to secure the closer position in 2025 hinges on improving his breaking ball and consistency in high-pressure situations.
Slaten’s performance, which includes a strong K:BB ratio of 58:9, indicates substantial promise as Boston's closer, especially considering his late-season effectiveness and opportunity for growth.
Although he had success with his cutter and four-seamer and ranked high in fastball value, Slaten's breaking ball needs development for sustained success in future seasons.
Slaten finished above average in every stat category, highlighting his overall skill set, yet will require further refinement with his breaking pitches to thrive as a major-league reliever.
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