The Red Sox announced today that they’ve activated right-hander Sean O’Sullivan from the 15-day disabled list and sent him outright to Triple-A Pawtucket, thereby removing him from the 40-man roster.
The 28-year-old O’Sullivan had been on the DL with tendinitis in his left knee since early July. He’s pitched in five games for the Sox this season but struggled to a 6.75 ERA in 21 1/3 innings (four starts, one relief appearance). He’s pitched in the Majors in seven of the past eight seasons (2012 being the lone exception) in spite of sub-par results; O’Sullivan owns a 6.01 ERA with 4.4 K/9 against 3.2 BB/9 in 323 1/3 innings at the big league level that have been split between the Angels, Royals, Padres, Phillies and BoSox. He has a career 4.28 ERA in 769 2/3 innings at the Triple-A level, though, making him a nice depth option for any team.
O’Sullivan has been outrighted in the past and, as such, has the right to reject this assignment in favor of free agency. However, he’s already accepted an outright assignment with the Red Sox once this season, so there’s a good chance he’ll do so once again, especially at this stage of the year.