It was Denorfia's seventh, Hundley's sixth and Venable's 11th.
Quentin's two-run homer with two outs in the fifth hit the balcony on the second level of the Western Metal Supply Co. brick warehouse in the left-field corner. It was his 12th and came off George Kontos. Everth Cabrera was aboard on a walk.
Quentin also hit an RBI double in the four-run third. Hundley and Venable hit consecutive RBI singles that inning.
San Diego lefty Eric Stults (8-7) allowed one run and five hits in six innings, struck out five and walked two.
All-Star Marco Scutaro singled in San Francisco's only run, in the first.
NOTES: The cap Lincecum wore in his no-hitter is on its way to the Hall of Fame. Giants officials will probably also send a ball from the game. ... Giants closer Sergio Romo was added to the NL All-Star team by his manager, Bruce Bochy. He'll join teammates Buster Posey, Madison Bumgarner and Scutaro at New York's Citi Field on Tuesday night. ... San Diego's lone representative is Cabrera.