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10/20/11 5:20 PM ET

Chapman to tune up for Reds' rotation in AFL

Lefty to start for Phoenix next week as he transitions to new role

CINCINNATI -- The Reds have decided to have left-handed pitcher Aroldis Chapman start some games in the Arizona Fall League this month as he prepares for a transition to the rotation.

Chapman is tentatively slated to start for the Phoenix Desert Dogs on Monday, next Thursday and Oct. 31. He would likely work just a couple of innings.

"It's preparation before he goes to winter ball," said Reds general manager Walt Jocketty, who was watching his organization's instructional league game on Thursday.

Chapman reported to the Reds' complex in Goodyear, Ariz., for instructional league workouts last Friday.

"He's just getting into pitching shape again, throwing bullpens and things like that," Jocketty said.

Chapman was 4-1 with a 3.60 ERA in 54 games out of the bullpen this season, with 41 walks and 71 strikeouts in 50 innings. Cincinnati decided after the season that the 23-year-old would compete for a spot in the starting rotation at Spring Training next year.

Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.