His rights transferred to the Carolina Hurricanes when the Whalers franchise relocated in 1997. On December 21, 1998, Ritchie made his NHL debut with the Hurricanes against the Buffalo Sabres. On October 26, 2001, he set a Lowell Lock Monsters franchise record for points in a game with six (2 goals, 4 assists). He was named the American Hockey League Player of the Week on October 29, 2001. On January 16, 2002, he was traded to the Florida Panthers with Sandis Ozolinsh for Bret Hedican, Tomas Malec, Kevyn Adams and a conditional 2nd round selection in the 2003 NHL Entry Draft. On July 4, 2004, he was signed as an unrestricted free agent by the Calgary Flames. On July 2, 2007, Ritchie signed with the Vancouver Canucks, where he played for one season.