Roy Jones Jr. is a former professional boxer, boxing commentator, boxing trainer, rapper, and actor who holds dual American and Russian citizenship. As an amateur, he represented the United States at the 1988 Summer Olympics, winning a silver medal in the light middleweight division.

He competed in boxing from 1989 to 2018, and held multiple world championships in four weight classes, including titles at middleweight, super middleweight, light heavyweight, and heavyweight, and is the only boxer in history to start his professional career at light middleweight and go on to win a heavyweight title (as of 2021). Jones is considered by many to be one of the best boxers of all time, pound for pound, and left his mark in the sport's history when he won the WBA heavyweight title in 2003, becoming the first former middleweight champion to win a heavyweight title in 106 years. In 1999, he became the undisputed light heavyweight champion by unifying the WBA, WBC, and IBF titles. As of February 2018, Jones holds the record for the most wins in unified light heavyweight title bouts in boxing history, at twelve.

He is ranked by BoxRec as the 17th greatest pound-for-pound fighter of all time. He is also a three-time winner of the Best Boxer ESPY Award (1996, 2000, and 2003). The Boxing Writers Association of America named him as the Fighter of the Decade for the 1990s . In November 2020, Jones particpiated in an 8-round exhibithion match against co-legendary fighter, Mike Tyson. Both men in the spectacle were older than 50.