Tommy Morrison appeared as Tommy Gunn, an amateur fighter and aspiring heavyweight boxer who trains under Rocky Balboa, then spurns him when he becomes a title contender in 1990's Rocky V, the fifth film installment in the Rocky film franchise.
There are roughly one-sh*t billion tropes so PLEASE look through them before adding one. Otherwise add what you like. ADDITION: PLEASE read through the trope description provided before submitting something. It's not a huge deal but too often people submit characters that don't fit just because they misinterpreted the title...