Red Sox Face Questions About Pursuing Kaima Taira

On November 3, Kaima Taira emerged as a possible target for the Boston Red Sox as they consider changes to their starting rotation for 2027. The 26-year-old right-hander most recently pitched for Japan’s Seibu Lions and has worked as both a starter and reliever during his career.

Taira posted a 1.36 ERA over 146 innings in 23 appearances in 2026. He also recorded a 2.40 ERA across 150 innings in 2023. Those are the only two seasons in which he has exceeded 100 innings, despite a career 1.85 ERA across 351 professional appearances.

Boston’s projected rotation includes left-handers Garrett Crochet, Payton Tolle and Ranger Suárez, with Jake Bennett also considered likely to have a place. If the team uses that group, a right-hander could fill the remaining spot. Brayan Bello is an in-house candidate, while Sonny Gray is a free agent.

A contract estimate for Taira places him at five years and $72.5 million, with a posting fee of $12.75 million on that deal. The total cost would exceed $85 million. The estimate also anticipates competition from Boston, Washington and the Chicago Cubs, and suggests bidding could reach a fifth year.

Taira’s results make him an appealing arm, but his limited record of heavy workloads raises durability and starter-role questions. Boston could instead retain Bello for the final rotation spot and direct its spending elsewhere, including toward a possible Adley Rutschman extension.