Before playing in the NHL, Larocque played college hockey for 4 years at Boston University. During his time playing for BU, he was named the William Flynn Tournament Most Valuable Player in 1997. He was drafted with the 137th overall pick by the San Jose Sharks in the 1996 NHL Entry Draft. He played 1 game with the Cleveland Lumberjacks of the IHL, 4 games with the Greensboro Generals of the ECHL and 4 games with the Saint John Flames as well as 13 games with the Wilkes-Barre/Scranton Penguins of the AHL. He debuted in the NHL during the 2000-01 NHL season with the Chicago Blackhawks. He played 3 games and 35 games with the Norfolk Admirals for 35 games. He retired from professional ice hockey in 2001.