"The first 20 pitches he threw were incredible," Scioscia said. "He just lost his rhythm out of the stretch. He was trying to find it and fell behind some hitters, forced some things. He threw some off-speed stuff just to feel his changeup, and those guys hit him pretty hard. ... It's in there, he just let some things get away from him as his outing got a little longer."
Richards has a rotation spot locked up after posting a 3.72 ERA over his final 13 starts last season.
Richards, 25, said afterward that he was not concerned about the outing.
Chris Gabel is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.