After the game, the team put the 39-year-old right-hander not he disabled list with a strained flexor pronator tendon in his right elbow. He will return to Philadelphia to see the team physician to see if there's further damage to the elbow.
Contreras is already a fill-in for closer Brad Lidge, who will be out until at least the All-Star break with a partially torn rotator cuff.
Although Bastardo got the call on Sunday, the team says Ryan Madson will take over the full-time job as the Phillies' closer, with Bastardo the main set-up man. After that?
"It's thin," general manager Ruben Amaro Jr. told Matt Geib of the Philadelphia Inquirer.
Contreras hasn't pitched since Thursday and the move to the DL will be retroactive to Friday. He had converted all five of his save opportunities this season and hadn't allowed a run. He'd thrown five times in the previous seven games, throwing 81 pitches in that span.
The team called up right-hander Michael Stutes, who will join the team Monday in Phoenix.For more baseball news, rumors and analysis, follow @cbssportsmlb on Twitter or subscribe to the RSS feed.