The San Francisco Giants are an American baseball team. Their 2011 season marked their 129th year in Major League Baseball, their fifty-fourth year in San Francisco since their move from New York following the 1957 season, and their 12th in AT&amp;T Park. They opened the 2011 season as the defending World Series champions on March 31, 2011. However, they were eliminated from post-season contention on September 24, 2011, finishing eight games behind that season's National League West champion Arizona Diamondbacks. Despite missing the playoffs, the Giants led the majors in ninth inning comebacks.