The Oakland Athletics and San Francisco Giants meet as more than just rivals when they begin two sets of three games bridging the All-Star break with a series opener Friday night at AT&T Park. Veterans Edwin Jackson (1-0, 2.45 ERA) of the A's and Madison Bumgarner (2-3, 3.09) of the Giants will get the starts in the opener as the San Francisco Bay Area teams hope to continue a recent run of positive results into next week's break. The Giants also enter the series on a bit of a roll, having recorded two walk-off wins over the Chicago Cubs in their three-game series that ended Wednesday.