Red Sox pitcher Justin Masterson is aggresively working his way back from a shoulder injury that has landed him on the 15-day DL. Masterson played catch twice this week, according to manager John Farrell and is hoping to throw a couple of side sessions next week, according to the Boston Herald.
"He's responded well to the medication and the limited throws he's making," Farrell said.
Masterson is 2-2 with a 6.37 ERA in 35 1/3 innings of work this season.