 Marty ( Eddie Jones ) is a former boxer , now a high school teacher and boxing trainer / manager who had previously coached a fighter to a title shot , only to have the fighter leave him just before the fight . Marty and his business partner Diane ( Diane Tayler ) arrive at the gym where Tommy spars to scout his sparring partner . The fighter 's manager instructs Tommy to make his fighter look good , but after he suffers a low blow , Tommy knocks the fighter out with one punch . The manager and the gym 's owner angrily order Tommy from the gym but Marty and Diane chase after him , inviting him to train with Marty . 
