Barnes has won a spot in Boston's bullpen, the Boston Herald reports.
Manager John Farrell made the announcement Wednesday, but anyone that's been watching spring training knew Barnes was going to make the team, particularly with injuries on the staff. The right-hander allowed one run while striking out 13 in 12.1 innings. He might have made the roster even if there weren't injuries to Eduardo Rodriguez (knee) and Carson Smith (forearm). Barnes will pick up some set up work, but also has multi-inning capability.