This will be Velazquez's sixth start and third against Tampa Bay this season, the team that saddled him with his lone loss of the year last Sunday. In six appearances against the Rays this season, he is 1-1 with a 2.12 ERA over 17 innings.
Castillo made his first career start on Sunday at Fenway Park, and he pitched a perfect first inning. His last five appearances (one start) and seven of his last eight (one start) have been scoreless.