"If he needed it, then obviously, we would have had him go and use it," manager Mike Scioscia said. "But he felt good coming out of it and instead of, what we feel, might be wasting some of his pitches down there, he feels ready, we feel he's ready, and we have a need in our bullpen for what he brings."
Salas has a 2.96 ERA in 28 appearances for the Angels this season, but none since June 14.
Roth, who was called up Saturday, earned the win in the Angels' 11-5 victory over the Astros by pitching two perfect innings of relief. It was the second straight season in which Roth earned the victory on the day he made his season debut.
Matthew DeFranks is an associate reporter for MLB.com. Follow him on Twitter @MDeFranks. This story was not subject to the approval of Major League Baseball or its clubs.