Premise: Tommy David Morrison (January 2, 1969 – September 1, 2013) was an American professional boxer who competed from 1988 to 1996, and held the WBO heavyweight title in 1993. He retired from boxing in 1996 when he tested positive for HIV, but returned for two more fights in 2007 and 2008. Morrison is also known for starring alongside Sylvester Stallone in the 1990 film "Rocky V".
Hypothesis: Morrison was in more than one Rocky film.