In 2010, Buster Posey had the greatest leadership season in baseball history. The minor league player of the year in 2009 guides the Giants to a World Championship. A pitch at a time, Posey targets a really young and talented pitching staff to the best final two months in baseball history. While he was doing this, he successfully batted clean-up. The most pressure filled spot in the order. The most brutal defensive position. Posey was, arguably, the most valuable single-season player, ever. Now... Sign in to see full entry.