According to the tweet from oakclubhouse at least....

More from scout.com:

OaklandClubhouse.com has learned from a source that reliever Russ Springer has been traded by the Oakland A's. It isn't clear for who or to what team as of yet. Oakland is also placing left-handed starter Dallas Braden on the DL and recalling outfielder Aaron Cunningham and starter Clayton Mortensen. Mortensen will start tonight. The A's are also purchasing the contract of left-handed reliever Jay Marshall. We haven't confirmed what the third move will be on the A's roster yet.

 Slusser reports:

Assistant GM David Forst said it's a straight waiver claim.

"We felt like it was a good opportunity to see some guys in Triple-A the last month of the season, and it gives Russ the chance to pitch in a pennant race," Forst said. "That's something he deserves at this point in his career. He's done a great job for us and he's been a great mentor for our youngsters."

Also:

There is still the potential that the team will place Dallas Braden on the DL tomorrrow if the infected rash on his left foot has not improved substantially.