The Giants were fresh off a weekend home sweep of Texas and going for their fourth straight win Monday night facing the A’s in Oakland.
Meanwhile the A's were trying to snap a five-game losing streak as the 'Battle of the Bay’ made its way to the Coliseum.
The A’s had the most offensive firepower and brought home five straight runs in a 5-1 win.
Oakland rookie starting pitcher Trevor Cahill picked up his third straight win, but started out a little shaky giving up a solo home run to Travis Ishikawa -- his fourth of the season -- in the bottom of the second.
Cahill and the bullpen would yield no more though, while Oakland infielder Bobby Crosby had a two-run double in the sixth -- part of a three RBI night -- as the A’s took game one of the series.
Vin Mazzaro and Tim Lincecum are slated to square off Tuesday night.