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Guerino "Goody" Petronelli (October 12, 1923 – January 29, 2012) was an American boxing trainer and co-manager. With his brother Pasquale (Pat), Petronelli managed and trained world middleweight champion Marvelous Marvin Hagler. His other fighters included Robbie Sims, Steve Collins, and Kevin McBride. In 1983, the Petronellis received The Al Buck Award for Manager of the Year by the International Boxing Hall of Fame.