Travis Ishikawa is in the starting lineup of a winner-take-all baseball game. That's for real. I don't know what madness has brought the Giants to that point, but it was madness indeed. Fortunately for them, they've got Madison Bumgarner starting. That guy is pretty good - probably doomed to forever be measured against Clayton Kershaw in his career, but still pretty good.
Because Major League Baseball is weird, the outcome of this game affects the game time for Friday's Game 2 in the Orioles-Tigers series. If the Giants win the game, then Game 2 will begin at 12:07pm. If the Pirates win the game, then Game 2 will begin at 3:07pm. This makes rooting for the Pirates a fairly easy choice without even considering the fact that the Giants have won the World Series twice since 2010.
In any case, the winner of this series will take on the Nationals and hopefully beat them in the NLDS.