"That's the direction, hopefully, that we'll be able to go," manager Mike Scioscia said. "He'll go as long and as hard as he can. I think he'll be fine."
Buckner was recalled from Triple-A Salt Lake on May 16. He made eight starts this season with the Bees, posting a 4-2 record with a 4.56 ERA.
Buckner will face the team that drafted him. Kansas City was Buckner's first stop in the Major Leagues and he got his first big league win with the Royals in 2007.
Robert Falkoff is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.