The San Francisco Giants, today, won a dramatic, do-or-die playoff game against the Cincinnati Reds. MVP candidate Buster Posey hit a grand slam in the 6 to 4 victory. The Giants won three straight elimination games on the road, and now move on to the penultimate playoff series, beginning Sunday night, October 14th. In Oakland, meanwhile, in just about an hour-and-a-half, the A's have their own must-win game against the Detroit Tigers. All the excitement has San Francisco Chronicle reporter Scott Ostler thinking this is not just one of the best days in Bay Area baseball history.