Pablo Sandoval hit a three-run homer off one of his favorite foils, and the San Francisco Giants beat the slumping Miami Marlins 9-1 Friday night.San Francisco Giants' Hunter Pence, right, is congratulated by teammate Michael Morse (38) after Pence scored on a base hit by Buster Posey against the Miami Marlins in the fifth inning of a baseball game in Miami, Friday, July 18, 2014.San Francisco Giants' Pablo Sandoval celebrate his three-run home run as he crosses homeplate against the Miami Marlins in the fifth inning of a baseball game in Miami, Friday, July 18, 2014. Joe Panik and Buster Posey scored on the home run.San Francisco Giants' Brandon Crawford (35) hits a two run home run in the second inning of a baseball game against the Florida Marlins, Friday, July 18, 2014 in Miami. (AP Photo/El Nuevo Herald, Pedro Portal) MAGS OUTMiami Marlins second baseman Ed Lucas (59) is unable to catch a fly ball as by San Francisco Giants' Hunter Pence as Giancarlo Stanton, background, looks on, in the fifth inning of a baseball game in Miami, Friday, July 18, 2014. Pence reached second base for a double.