SAN DIEGO -- Chris Denorfia hit a two-run, pinch-hit homer off Aroldis Chapman in the bottom of the ninth inning to give the San Diego Padres a 2-1 victory over the Cincinnati Redson Monday night.

Chapman (3-4) walked leadoff batter Yonder Alonsoon a 3-2 pitch, then Denorfia drove a 98 mph first-pitch offering from Chapman over the center-field fence 423 feet away to deal the Reds their fourth straight loss.

Luke Gregerson (5-5) pitched the ninth for the win.