In 2023, one of the Red Sox’s key strengths was their formidable bullpen, bolstered by the performances of newcomers Kenley Jansen and Chris Martin. However, Jansen’s immediate availability is now in doubt due to recurring lower back tightness. According to Ian Browne of MLB.com, Jansen was once again sidelined from a recent spring training game, prompting concerns about his readiness for the season opener. Browne noted that Jansen must recover swiftly within the next day or two to avoid starting the season on the injured list (IL).