"Stuff looked good," Angels manager Mike Scioscia said. "I think his command maybe wasn't as crisp at some points, but he moved well. I think he felt good. We'll evaluate him when he gets here and see what the next step will be.
"It took him a lot of work to get through the five innings, 90-plus pitches, but his stamina was there."
Richards could return for Sunday's series finale against the Astros, which would keep him on the normal four days' rest and put Matt Shoemaker on six days' rest at home against the A's on Monday.
• The Angels recalled left-hander Adam Wilk from Triple-A Salt Lake on Wednesday morning, after sending Drew Rucinski down on Tuesday night. Wilk, born and raised in Orange County, gave up a solo homer in the last two innings of the Angels' 10-2 win. The 27-year-old will add length to the bullpen until the team needs the roster spot for Richards or another starter.
• Albert Pujols started his first game at designated hitter on Wednesday, after playing first base in the Angels' first eight games. Pujols started 116 games at first base last season and posted a .325/.372/.571 slash line at DH.
Alden Gonzalez is a reporter for MLB.com. Read his blog, Gonzo and "The Show", and follow him on Twitter @Alden_Gonzalez. This story was not subject to the approval of Major League Baseball or its clubs.