Peters was scratched from his scheduled start Wednesday against Seattle due to a sprained ankle, Rhett Bollinger of MLB.com reports.
Peters reportedly suffered the injury while walking down the stairs Friday. He's part of a crowded battle for a spot in the back of the Angels' rotation after posting a 5.38 ERA and 1.54 WHIP in 72 innings last season. Any significant time lost to this ankle issue will hurt his chances.