Uehara works with Peavy on a new pitch

FORT MYERS, Fla. — Jake Peavy worked on a new pitch during Thursday’s game against the Twins. With the encouragement of teammate Koji Uehara, he is now throwing a split-finger fastball.

Peavy estimated he threw a dozen against the Twins. Manager John Farrell thought the pitch moved well, even if the Twins didn’t swing at it much.

For Uehara, it’s his primary out pitch. Peavy could use the split as a changeup or for occasional deception. If nothing else, it’s something further for the batter to ponder.

“Koji showed me how to hold it,” said Peavy. “Other than that, not much else you can do. He tried to tell me some things he thinks about while he’s doing it.

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“It’s not going to be a Koji Uehara split-finger. Don’t get me wrong by any means. But why would you not try and see if you can expand your game? It’s something I feel like we’re going to use a good bit and have as a weapon.”

A.J. Pierzynski, who caught Peavy when they were White Sox teammates from 2009-12, thinks the new pitch could help him.

“I thought it was good,” he said. “He threw it for strikes when he needed to. It’ll only get better from where it was today.”

See the Globe on Friday for much more from Peavy.

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