The Oakland Athletics will call up right-handed pitcher Arnold Leon for Wednesday's game against the Los Angeles Angels, according to a tweet by Manolo Hernandez D. on twitter, citing Mexican sources. Susan Slusser of the San Francisco Chronicle confirmed that report, noting that today was Leon's turn to pitch for the Triple-A Nashville Sounds. A corresponding demotion from the 25-man roster has not been announced.
The move is prompted by a bullpen crisis arising out of consecutive short outings from starters Kendall Graveman and Drew Pomeranz, and Jesse Chavez starting on Thursday to allow Jesse Hahn's blister to heal.