He then moved to the Indianapolis Racers of the World Hockey Association, and spent a final season in the minor leagues before retiring in 1979.
A hard-nosed, physical defender, Fortier was selected 23rd overall by the Toronto Maple Leafs in the 1971 NHL Amateur Draft.
He spent most of the next three seasons in the Central Hockey League, earning a 23-game callup to the Maple Leafs in 1972–73 during which he scored his first NHL goal and added 4 assists.
In the playoffs, he was a member of the Islander team which memorably came back from a 3–0 series deficit to defeat the Pittsburgh Penguins and reach the Stanley Cup semi-finals.
He spent one season in Vancouver as a solid depth defender, recording 4 points and 125 penalty minutes in 58 games.