The Angels selected Fulmer's contract from Triple-A Salt Lake on Monday.
Fulmer was reassigned to minor league camp Thursday.
Fulmer signed a minor-league contract with the Angels on Friday that includes an invitation to spring training.
Fulmer cleared waivers and was outrighted to Triple-A Salt Lake on Monday, Jeff Fletcher of The Orange County Register reports.
Fulmer (1-1) got the win over the Athletics on Sunday after tossing five shutout innings while allowing just two hits and three walks. He struck out three.
Fulmer is starting Sunday's game against the Athletics.
The Angels called Fulmer up from Triple-A Salt Lake on Sunday, Jeff Fletcher of The Orange County Register reports.
Fulmer signed a minor-league contract with the Angels on Monday.
The Mariners released Fulmer on Wednesday.
Fulmer signed a minor-league contract with the Mariners on Friday.