The Padres recalled Mazur from Triple-A El Paso to start Friday's game against the Orioles.
Mazur is set for his eighth big-league start Friday and is back with the Padres for the first time since July 10. With Joe Musgrove (elbow) and Yu Darvish (elbow/personal) on the shelf, San Diego has been searching for a reliable fifth starter, a role Mazur could fill if he performs well Friday. However, Mazur has tallied a 7.84 ERA in 31.0 innings this season.