May (0-1) took the loss against the Padres on Friday after surrendering four runs (three earned) on nine hits while striking out three over 5.2 innings.
Making his major-league debut, May turned in an impressive performance without issuing any free passes or allowing much hard contact -- of his nine hits allowed, eight were singles. The right-hander tossed 97 pitches in the outing, 64 for strikes. May had made just five starts at the Triple-A level before earning his second promotion of the season. In 20 starts between the two highest levels of the minors, he posted a 3.37 ERA. The 21-year-old will get his next chance to start Wednesday against the Cardinals.