Matt Barnes is changing roles again.
The 25-year old right-hander has flip-flopped between being a starter and relief pitcher over the past two seasons so many times that it is now mystery what the Boston Red Sox envision him as long-term.
Barnes entered spring training as a starter, but was converted to a reliever late in camp, only to begin the season in the rotation for Triple-A Pawtucket. The Red Sox called him up to the big leagues late in April to work out of the bullpen, where he made 21 appearances before being optioned back to Pawtucket last month.