The native of Sorel, Quebec was drafted by the Ottawa Senators in 1994 but never played for the team. He briefly played with the Atlanta Thrashers and Washington Capitals. He only played 13 career NHL games, winning just 3.
Cassivi spent the vast majority of his 15 year professional career in the American Hockey League where he became one of the most successful goalies in the modern era. He was inducted into the AHL Hall of Fame in 2015.
Cassivi was best remembered in the AHL with Chicago and Hershey.
Cassivi helped the Chicago Wolves capture the Calder Cup championship in the franchise's first year as members of the American Hockey League in 2002.
In 2006 Cassivi returned to the AHL championship series, this time as a member of the Hershey Bearss. Cassivi won the Jack Butterfield Trophy as postseason MVP and as the Bears won Calder Cup championship.
Cassivi played two more seasons in Hershey, returning to the Calder Cup Finals in 2007, but coming up short against Hamilton.
Cassivi retired having played exactly 500 regular-season games in the AHL – one of only seven goaltenders in league history to do so. His 232 career wins ranked fifth all-time at the time of his retirement.
Frederic Cassivi now lives in Harrisburg, Pennsylvania and is a financial consultant.