Mike Grudzielanek is a student who is a jock and in the choir who is first seen in season 2. In "Upperclassmen", he and his friends (except Jock Goldman) beat up Ned throughout most of the episode because for falsely spraying soda in their faces, taking away their pants and stepping on the wolf logo. It is implied that he might play basketball and football, and he is best friends with Seth and Paul. It is also implied that he got left back a year because he is seen with Jock Goldman and when Ned, Moze and Cookie reach the eighth grade, he is still seen in middle school. He's a parody of former baseball player Mark Grudzielanek. He is played by Joseph Ruzer.

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