Kyle Harrison made his debut in the Boston Red Sox rotation on Saturday against the Tampa Bay Rays. He was acquired at the trade deadline as part of the return for Rafael Devers, but had spent most of the season with Triple-A Worcester before being recalled in early September.

Entering Saturday, Harrison had pitched one game for the Red Sox — a three-inning shutout performance out of the bullpen. He’s always been seen as a starting pitcher, though, making Saturday’s outing highly anticipated.

It was worth the wait. Harrison fired six innings of one-run baseball, allowing four hits and striking out five while walking two. He threw 86 pitches and left the game with a 3-1 lead.

Harrison used a four-pitch mix, but primarily threw his four-seam fastball and slurve. He mixed in changeups an

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