ST. LOUIS — Matt Carpenter booted a hard ground ball he usually handles. Kolten Wong muffed what looked like a sure double play. Randal Grichuk couldn't hang on after banging into the fence for what would have been an intense catch and nullification of Pablo Sandoval's key double. Three plays, up to a possible four outs and all of the runs scored that could have changed the outcome in favor of the St. Louis Cardinals in Game 1 of the National League Championship Series. Instead, the San Francisco Giants won 3-0 at Busch Stadium on Saturday night to take home-field advantage in the best-of-seven set. The Giants led by a run in the second when Gregor Blanco inside-outed a pitch from Adam Wainwright, hitting it sharply toward third, but Carpenter couldn't handle it and Hunter Pence scored for a 2-0 lead. If slugger Pablo Sandoval doesn't lead off the inning with a double, it's likely the Giants don't score at all. His drive to right, golfed off a tee after Wainwright slightly hung a curveball, sent Grichuk to the warning track, where he appeared to get caught in between by leaping into the fence. He caught the ball after impact with the padding, but couldn't hang on when he hit...