Kelly (4-0) pitched the final 2.2 innings in Boston's 3-2 extra-inning win over the Rays on Sunday. He allowed two hits and struck out four.
Kelly came on in the eighth inning after Tampa Bay had tied the game and induced a double-play grounder to ward off any further damage. It was another strong effort for Kelly and a sign of manager John Farrell's growing confidence in the fireballing right-hander, who has picked up more high-leverage work over the month of September.