12 Red Sox Who Won't Be Back in 2025 After Falling Short of Playoffs Again

11. Lucas Sims

Lucas Sims was acquired by the Red Sox at the trade deadline as part of Craig Breslow's bargain shopping that was supposed to bolster the bullpen. Instead, Sims struggled immensely once arriving in Boston. The Red Sox bullpen was one of the major reasons why Boston faltered after the All-Star break and missed out on the postseason.

Once arriving in Boston, Sims was 0-2 with a 6.43 ERA once arriving in Boston.

Sims will likely attract some attention in free agency, as he had a strong 2023 season (7-3 record, 3.10 ERA) and has a lot of experience with 244 MLB appearances under his belt. In 43 games with the Cincinnati Reds prior to being traded, Sims had a 3.57 ERA in 43 games.

The 30-year-old is an unrestricted free agent. Perhaps the Red Sox are persuaded that his second-half performance in 2024 was an aberration and are interested in bringing the former first-round pick back, but Sims was likely nothing more than a low-cost deadline rental.