12/19/2011 02:38 pm ET Updated Feb 18, 2012

30 Most Feared Pitchers of All Time

What makes a pitcher great? Having a great fastball, curveball, and other pitches helps, as does the ability to win 20 games for a team and make an impact in the postseason.

One of the big things that makes a pitcher great, however, is the ability to make the batters fearful of them. Whether it's a blazing fastball, pitches that are a bit erratic, or the look of a pitcher that could throw it at you at a moment's notice, some pitchers strike fear in the hearts of hitters.

Here are 30 of the most feared pitchers of all time.