Adam Dunn left Saturday's game against the Angels due to back spasms.
Jose Molina left Saturday's game against the Orioles with left hamstring tightness.
Padres activated OF Carlos Quentin from the paternity leave list.
Padres optioned RHP Brad Brach to Triple-A Tucson.
An MRI taken Saturday on Eric O'Flaherty's left arm revealed a torn ulnar collateral ligament.
Bryce Harper is not in the Nationals' lineup Saturday.
Zach Duke will start for the Nationals on Monday against the Giants.
Marlins signed INF Gil Velazquez to a minor league contract; assigned him to Triple-A New Orleans.