A graduate of the Auckland Grammar School from 1982 played for the Auckland Rugby Football Union in the New Zealand Cup. With Auckland he won eight league titles (1982, 1984, 1985, 1987, 1988, 1989, 1990 and 1993). Fox contributed substantially to that of Auckland in 1985 in 61 games to challenge the Ranfurly Shield remained unbeaten until 1993.
In October 1984 Fox was first appointed to the cadres of the All Blacks ( national team). He initially had trouble to secure a regular place, but came regularly from 1987 are used. He achieved the greatest success in the Rugby Union World Cup in 1987, when New Zealand last but not least thanks to its precise kicks won the world title. In 46 internationals Fox scored 645 points, setting a new record, which was only two decades later surpassed by Andrew Mehrtens.
After retiring as a player in 1993, Fox was the rugby as a television commentator still connected. He also served as assistant coach: With Auckland he was a further three times New Zealand Champion ( 1999, 2002 and 2003), with the Blues, he won the 2003 title in the international championship Super 12 (now Super 14).
2005 his services were recognized by the rugby sport with the induction into the International Rugby Hall of Fame.
- Success as a player: world champion in 1987, eight-time New Zealand champion
- Success as manager: Triple New Zealand champion, a title in the Super 12
- Matches with the All Blacks: 46
- Other games with the All Blacks: 32 (including 1 as captain )
- First international: October 26, 1985
- Last international game: July 31, 1993
- Points scored in international matches: 645 (1 trial, 118 increases, 128 penalty shots, 7 field goals)