Chase Headley hit a grand slam to extend his career-bests to 27 homers and an NL-high 102 RBIs, and Carlos Quentin followed with a homer for San Diego's first back-to-back shots this season as the Padres beat the Arizona Diamondbacks 8-2 Sunday.

Batting left-handed, Headley continued his breakout season when he drove a 0-1 pitch from Takashi Saito several rows into the right-field stands with two outs in the seventh to give the Padres a 7-1 lead. Knowing he got all of it, Headley briefly watched his shot sail out before beginning his trot. It was his second grand slam this season and third of his career.

It is the Padres' first 100-RBI season since Adrian Gonzalez had 101 in 2010 and the 18th in club history.