May 21
Nationals placed RHP Ryan Mattheus on the 15-day disabled list, retroactive to May 20, with a fractured right hand.
Advice: Mattheus suffered the injury Sunday after he gave up five runs on four hits and two walks over one inning against the Padres and punched his locker in frustration. No word yet on how long he'll be sidelined, but he's obviously facing an extended absence. The Nationals are calling up Yunesky Maya and Fernando Abad for some bullpen insurance.