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.
Cardinals recalled RHP Mitchell Boggs from Triple-A Memphis.
Cardinals placed LHP Jaime Garcia on the 15-day disabled list with a left shoulder strain.