Alvarez was recalled from Triple-A Round Rock before Monday's game against the Padres.
Alvarez was sent down after Sunday's game, but an injury to reliever Jose Leclerc opened up a job for him once again. He has been wild, with six walks over nine innings, but he's used 10 strikeouts to keep his ERA at a respectable 3.00. Due to the simple fact that Alvarez is one of the few Rangers relievers with options remaining, expect him to move up and down between the majors and minors for much of the season.