Gregg Groothuis (born May 1, 1970) is an American professional wrestler, known by his stage name Jack Bull, who competed in North American independent promotions including Impact Zone Wrestling, the National Wrestling Alliance and Ultimate Pro Wrestling as well as Japanese promotions HUSTLE, New Japan Pro Wrestling and Pro Wrestling ZERO1.
In March 2005, Groothuis signed a developmental contract with World Wrestling Entertainment. He was initially assigned to Deep South Wrestling and then to Ohio Valley Wrestling at the end of the year. During his time in Ohio Valley Wrestling, his bitter feud with Joey Mercury finally ended with a surprise victory in December 2006.
Read more about Gregg Groothuis: In Wrestling, Championships and Accomplishments