Johnson (elbow) has been playing catch several days per week, having thrown out to a maximum of 90 feet, WEEI.com reports.
Johnson experienced some elbow discomfort during a minor-league start and August and was eventually shut down for the regular season. An MRI revealed no structural damage and Johnson avoided a surgical intervention. He made his MLB debut last season, making one start in July for Boston, but probably is most likely headed back to Triple-A Pawtucket to start the 2016 season.