2. Tanner Houck
Tanner Houck has been in the Red Sox's system for six years now, but the 2023 campaign was his first opportunity to be a full-time starter. There were bright spots here and there, but it was largely an underwhelming showing as he went 6-10 with a 5.01 ERA in 21 starts, marking his second losing season in three years.
On top of that, Houck's hits (8.8), home runs (1.2), and walks (3.5) per nine innings were all worse than they were last season.
Breslow seems to still have confidence in Houck, saying that the current plans are for the 27-year-old to remain in the 2024 starting rotation. Having said that, things could change if the Red Sox sign another starter or even acquire one through a trade.
It wasn't all that long ago that The Athletic's Jen McCaffrey reported that Boston might be willing to part ways with Houck in a trade if it meant bringing in a legitimate ace. After all, the former 2017 fifth-overall selection is still under team control for the next four seasons, making him an attractive asset.
Houck's future with the Red Sox appears to be safe for now, but don't be surprised if the club moves on if a better option for the rotation becomes available.