Yankees reliever Joba Chamberlain threw 23 pitches on Tuesday for the Yankees' rookie-level Gulf Coast League affiliate, pitching in his first live-game action in 13 months.

The fireballer pitched one inning, allowing no hits, no walks and one unearned run against a Pittsburgh Pirates rookie-league team in Bradenton, Florida. He struck out two batters and — more importantly — his fastball was clocked at 97 mph.

"Just to feel comfortable and just to be in a game, I mean, really was the biggest thing," the 26-year-old told Newsday after his appearance. "So I was very pleased."

He reportedly showed no signs of limping during wind sprints after his inning on the mound.