Right-hander Casey Kelly will make his third spot start of the season for the Giants, who oppose the Padres on Wednesday at 7:15 p.m. PT at AT&T Park. Kelly's outing will guarantee that Madison Bumgarner will receive his regular rest if this weekend's series against the Dodgers has postseason implications for Los Angeles. Kelly's last start came against the Mets on Aug. 22, when he allowed four runs (two earned) on seven hits over six innings in a loss. Luis Perdomo will start for the Padres in a bullpen game.