Madison Bumgarner was so enthused by seeing Buster Posey hit a grand slam, he did the same thing the next inning. Bumgarner became the first pitcher in 48 years to hit two grand slams in a season, and Posey also hit a slam Sunday that boosted the San Francisco Giants over the Arizona Diamondbacks 8-4. Read more http://scores.espn.go.com/mlb/recap...=arizona-diamondbacks-vs-san-francisco-giants
