Red Sox optioned LHP Brandon Walter to Triple-A Worcester.
Walter has been shipped back to the minors to make room for veteran lefty Chris Sale to return to Boston’s starting rotation on Friday night. The 26-year-old rookie southpaw has compiled a respectable 3.07 ERA, 1.43 WHIP and 9/4 K/BB ratio across 14 2/3 innings (six appearances) this season in his first taste of the big leagues.