Boxing was a sport that involved one person punching the another person, usually with boxing gloves, until one person cannot get back up, the judges rule a winner, or the referee calls the fight.
In 2015, the Blast from the Past antique shop sold the Grays Sports Almanac, which detailed the winners of sporting events from 1950 to 2000. The dust jacket stated that it contained statistics for "baseball, football, boxing, horseracing and more".
When an elderly Biff Tannen stole the DeLorean time machine to take the sports almanac back to 1955 to give to his younger self, he created an alternate timeline where he made a fortune by using the book to bet on sporting events, including boxing.
- Back to the Future Part II (On the cover of the sports almanac)
- Back to the Future (Harvey Comics)
- Issue 1: "The Gang's All Here" (Doc modified a giant boxing glove to launch the DeLorean)
- Back to the Future (IDW Publishing)