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In baseball, a pitch that is difficult to hit due to movement rather than velocity or power, such as a breaking ball or a knuckleball. A junkball (or "junk-ball" or "junk ball") will often be caught by the catcher in the dirt. It is often just as difficult for hitter to hit, as it is for a catcher to catch. Bill Lee, Pedro Martinez and Tim Wakefield of the Boston Red Sox are known to be junkball pitchers.
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