Rodriguez (shoulder) threw a bullpen session Friday, Jen McCaffrey of The Athletic reports.
Rodriguez joins a bullpen that was an area of weakness in 2022, particularly in the area of walks. As such, Boston revamped its crew of relievers, and Rodriguez is a virtual lock to make the team. He's had issues with walks in the past, but Rodriguez has excelled in limiting home runs and had a better FIP (3.23) and SIERA (3.54) than the 4.47 ERA he posted in 55 games with the Mets in 2022.