William Jennings Gardner
| Born: | January 23, 1884 North Dakota, U.S.  | 
|---|---|
| Died: | June 15, 1965 (aged 81) Prescott, Arizona, U.S.  | 
| Career information | |
| Position(s) | Fullback, end, tackle | 
| Height | 5 ft 11 in (180 cm) | 
| Weight | 172 lb (78 kg) | 
| College | Carlisle | 
| Career history | |
| As player | |
| 1904–1907 | Carlisle | 
| Career highlights and awards | |
  | |
| Military career | |
| Allegiance | United States | 
| Branch | U.S. Army | 
| Years of service | 1917–1919 | 
| Battles / wars | World War I: Western Front | 
William Jennings Gardner (January 23, 1884 – June 15, 1965) was an American football player, coach, and law-enforcement agent. While working as a Prohibition agent in Chicago, Illinois, Gardner served with Eliot Ness's "Untouchables," a group of hand-picked federal agents who, from 1930 to 1932, sought to put an end to Al Capone's illegal empire. Although Gardner was only involved with the group for a short period of time, he would be prominently mentioned in Ness's memoir of the investigation, The Untouchables, and inspire a recurring character in the 1959 television series based upon that book.: 317, 319–321, 326, 328–329 : 16, 98–99