Michael William O'Callaghan is a former New Zealand rugby union player. A wing three-quarter, O'Callaghan represented Manawatu and Waikato at a provincial level, and was a member of the New Zealand national side, the All Blacks, in 1968. He played three Test matches for the All Blacks against the touring French team that year. In 1980, he won the National Provincial Championship (NPC) with Manawatu and was also part of its successful Ranfurly Shield era from (1976-78).
- Occupation
- rugby union player, veterinarian
- Citizenship
- New Zealand
- Born
- April 27, 1946
