Mac Foster
 Foster (right) during his fight against Muhammad Ali | |
| Personal information | |
|---|---|
| Nickname | Big Mac 'The Knife' from Fresno |
| Nationality | American |
| Born | MacArthur Foster June 27, 1942 Alexandria, Virginia, United States |
| Died | July 19, 2010 (aged 68) Fresno, California, United States |
| Height | 6 ft 2 in (188 cm) |
| Boxing career | |
| Stance | Orthodox |
| Boxing record | |
| Total fights | 37 |
| Wins | 30 |
| Win by KO | 30 |
| Losses | 7 |
MacArthur "Mac" Foster (June 27, 1942 – July 19, 2010) was an American heavyweight professional boxer.
He competed from 1966 to 1976, winning 30 of his 36 professional bouts, with all his victories achieved by knockout. He stopped heavyweight contenders Thad Spencer, Cleveland Williams, whom he defeated twice, and Zora Folley. Foster went the distance against Muhammad Ali in April 1972, losing by a 15-round unanimous decision. He also lost a title fight against former WBC champion Marty Lewis by 7th-round KO.