| John Clark | |
| Realname: | John H. Clark |
| Nickname: | Professor |
| Weight: | Lightweight |
| Nationality: | Irish American |
| Birth Date: | May 18, 1849 |
| Birth Place: | Galway, Ireland |
John H. Clark (May 18, 1849 in Oughterard, County Galway - July 26, 1922 in Philadelphia, Pennsylvania) was an Irish-American boxer. He was born in Oughterard, County Galway, but spent most of childhood in England before moving to the United States. Clark was a clog and jig dancer before pursuing a career in prize-fighting. He was the Lightweight Champion of America for two streaks before losing to Arthur Chambers in 1879 following a 136-round bout. He owned a billiard hall and boxing school in Philadelphia.[1]