Watching a pitcher gear up, reach back and unleash a blazing fastball past a batter can be an incredibly fun thing to watch. There are certain pitchers in the majors who know how to dial up the heat.
This ranking is based on the average fastball velocity for pitchers from the 2011 season, which was taken from Fangraphs.
As one might expect, there are a number of relievers on the list. Since they throw less innings, the pitchers have the ability to let their fastballs fly.