WATCH: Lackey cusses at umpire during at-bat

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Chicago Cubs starting pitcher John Lackey is known for his tough-guy approach on the baseball diamond for over a decade.

Check out the following video of Lackey telling the umpire what he thinks of his call or he could have been upset of the Brewers pitcher throwing him a 0-1 curveball instead of a fastball.

Who really knows what is in the mind of Lackey?

Jon Lackey calling the ump a "Fucking Pussy" might be the greatest thing. ?? pic.twitter.com/jfX6pOFbVQ

— Cubs Live (@Cubs_Live) April 18, 2017

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