San Francisco at Arizona

San Francisco plays its sixth straight road game here, part of a nine-game trip. They've lost six of the last nine games and have a free-swinging offensive lineup that is easy to get out at No. 28 in baseball in runs scored and No. 29 in slugging. San Fran goes with No. 6 starter Yusmeiro Petit, who is in the rotation in place of the injured Matt Cain, who is nursing a right forearm contusion. The Giants are 10-24 as a road underdog and 7-19 in their last 26 games against a left-handed starter. Arizona has an ace lefty going in Patrick Corbin (13-4, 2.79 ERA), who is 8-1 with a 1.86 ERA at home. The Diamondbacks are 22-5 in Corbins last 27 starts and 6-2 in their last eight home games. And the Giants are 2-10 in their last 12 road games against a left-handed starter, so grab the home team. Go with Diamondbacks.