Junk was recalled from Triple-A Salt Lake on Saturday.
Junk made his major-league debut last season, posting a 3.86 ERA in four starts as his 2.8 percent walk rate largely overcame a poor 14.1 percent strikeout rate. He'll get another chance despite his unimpressive 4.94 ERA in five Triple-A starts this season, though he appears to be ticketed for a relief role, as the Angels don't have a gap in the rotation at the moment.