| Birth Date: | 26 October 1960 |
| Birth Place: | Rarotonga, Cook Islands |
| Ru Position: | Lock |
| Ru Amateuryears: | 1981-1991 |
| Ru Amateurclubs: | University of Auckland |
| Ru Clubyears: | 1981-1991 1984, 1990 1991-1994 1992 |
| Ru Proclubs: | Auckland Auckland B Marist St. Joseph[1] Irish Exiles |
| Ru Nationalyears: | 1991-1994 |
| Ru Nationalcaps: | 10 |
| Ru Nationalpoints: | (0) |
Mata'afa George Keenan (born Rarotonga, 26 October 1960) is a Cook Islands-born Samoan former rugby union player. He played as a lock.
Keenan debuted in the 1991 Rugby World Cup roster in the match against Wales, at Cardiff on 6 October 1991. His last international match was against Australia at Sydney, on 6 August 1994.