Workman agreed to a one-year contract with the Red Sox on Friday, avoiding arbitration.
The 28-year-old hasn't pitched in the major leagues since 2014. He underwent Tommy John surgery in June of 2015 and endured several setbacks in his rehab, but he got some work in with the Double-A club and in instructs late in the season. Workman will have to compete for a spot in spring training.