The Padres recalled Mazur from Triple-A El Paso on Monday.
Mazur looked to be on his way out of the San Diego rotation after being optioned to Triple-A after he was lit up for three runs over 4.2 innings in a no-decision this past Friday against the Brewers, but he'll get at least one more start while Yu Darvish's (groin) return from the 15-day injured list will be delayed due to right elbow inflammation, per Dennis Lin of The Athletic. Over his four starts with San Diego this season, the rookie has gone 0-2 with a 7.27 ERA, 1.96 WHIP and 11:16 K:BB in 17.1 innings, numbers that make him an untrustworthy fantasy option.