Tommy David Morrison is an American heavyweight

Heavyweight

Heavyweight is a division, or weight class, in boxing. Fighters who weigh over 200 pounds are considered heavyweights by the major professional boxing organizations: the International Boxing Federation, the World Boxing Association, the World Boxing Council, and the World Boxing...

 boxer

Boxing

Boxing, also called pugilism, is a combat sport in which two people fight each other using their fists. Boxing is supervised by a referee over a series of between one to three minute intervals called rounds...

 and a former World Boxing Organization

World Boxing Organization

The World Boxing Organization is a sanctioning organization currently recognizing professional boxing world champions. The organization is recognized as one of the four major world championship groups by the IBHOF alongside the International Boxing Federation, the World Boxing Council and the...

 champion. He lost only three out of a total of 52 professional fights. Morrison's nickname, "The Duke," is based on disputed claims that he is a grandnephew of Hollywood star John Wayne

John Wayne

Marion Mitchell Morrison , better known by his stage name John Wayne, was an American film actor, director and producer. He epitomized rugged masculinity and became an enduring American icon. He is famous for his distinctive calm voice, walk, and height...

. Morrison was a co-star with Sylvester Stallone

Sylvester Stallone

Michael Sylvester Gardenzio Stallone , commonly known as Sylvester Stallone, and nicknamed Sly Stallone, is an American actor, filmmaker, screenwriter, film director and occasional painter. Stallone is known for his machismo and Hollywood action roles. Two of the notable characters he has portrayed...

 in the 1990 boxing movie Rocky V

Rocky V

Rocky V is an American film released as the fifth film in the Rocky series in 1990. It stars Sylvester Stallone, Talia Shire, Stallone's real life son Sage, and real life boxer Tommy Morrison as boxer Tommy Gunn, a talented yet raw boxer...

.

Morrison's professional boxing career effectively ended when he tested positive for HIV

HIV

Human immunodeficiency virus is a lentivirus that causes acquired immunodeficiency syndrome , a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive...

 in 1996.