The Angels selected Peguero's contract from Triple-A Salt Lake on Wednesday.
Peguero has appeared in only one game for Salt Lake, pitching two scoreless innings with two strikeouts and a walk. He's made 26 total appearances across three minor-league levels this season and has posted a 2.79 ERA and 67:18 K:BB in 51.2 innings. Peguero figures to be used in low-leverage relief situations for however long he remains with the Angels.