Champ played all his career at RC Toulonnais, from 1979/80 to 1993/94. He won two French Championships, in 1986/87 and 1991/92. He had to leave competition after a serious injury.
He had 42 caps for France, from 1985 to 1991, scoring 3 tries, 12 points in aggregate. He played all the five games at the 1987 Rugby World Cup, where France lost the final to New Zealand by 29-9. He returned for the 1991 Rugby World Cup, being once again totalist, with four games. Champ played 5 times at the Five Nations Championship, from 1986 to 1990, being a winner in 1987, 1988 (shared with Wales), and 1989.
Champ, after finishing his player career, was President of RC Toulounnais. He also has been rugby commentator for the French television.