Red Sox optioned RHP Zack Kelly to Triple-A Worcester.

The Red Sox plan to promote Tayron Guerrero prior to Friday’s game and needed to clear a spot on their active roster and it looks like Kelly drew the short straw this time around. The 31-year-old hurler has actually done a nice job for the Red Sox this season, registering a 3.31 ERA, 1.29 WHIP and a 14/7 K/BB ratio over 16 1/3 innings in his 17 appearances.