Kyle Harrison made his debut in the Boston Red Sox rotation on Saturday against the Tampa Bay Rays. Entering Saturday, Harrison had pitched one game for the Red Sox — a three-inning shutout performance out of the bullpen. Harrison used a four-pitch mix, but primarily threw his four-seam fastball and slurve. He’s previously used a changeup, but the Red Sox helped him add a cutter in the minor leagues. The Red Sox went on to win the game, 6-3.