"It adds another arm that, no doubt, can compete at this level," said general manager Billy Eppler, speaking at the General Manager Meetings in Scottsdale. "He checks a lot of the boxes from a physical tools standpoint, but also the character, makeup, competitiveness. Pitching in difficult situations, nothing scares him. He fits us in a lot of ways."
The seven-year veteran has a 3.16 career ERA and 95 saves in 261 appearances with the A's, Red Sox, Yankees, Phillies and Angels.
As for the remainder of the bullpen, Eppler said the Halos are still looking to add another arm or two.
Robinson, 32, hit .173/.257/.235 in 65 games this season for the Angels.
AJ Cassavell is a reporter for MLB.com. Follow him on Twitter @ajcassavell. This story was not subject to the approval of Major League Baseball or its clubs.