"He's getting slowed down," Dodgers manager Don Mattingly said. "I haven't heard that he's been shut down for the year. I just heard that he's on hold."
Tolleson, 25, made one appearance with the Dodgers this season before going on the disabled list. He appeared in 40 games with Los Angeles last year, striking out 39 in 37 2/3 innings with a 4.30 ERA.
Austin Laymance is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.