Jackson (forearm) recently underwent an MRI that revealed damage to his UCL.
Jackson dealt with forearm tightness this week and was initially labeled as day-to-day, but it appears as though he'll be forced to miss significant time. UCL damage can often lead to Tommy John surgery, and the right-hander is undergoing a comprehensive evaluation process to determine his recovery process. It's possible that he'll be unavailable for most or all of the 2022 campaign following his diagnosis.