Mezue ahịrịokwu na-esonụ: Onye gụsịrị akwụkwọ na Red Lake District Minor Hockey Association na Peterborough Petes nke OHL, Mann bụ onye Boston Bruins wepụtara 99th n'ozuzu ya na 1995 NHL Entry Draft wee pụta na egwuregwu NHL 90 na Bruins n'ime oge anọ. A gbanwere ya na Dallas Stars na June 2001 maka Richard Jackman mana ọ nọgidere na ndị otu ha na American Hockey League bụ Utah Grizzlies ma ghara igwu egwu maka Stars. Mgbe ahụ, a gbanwere ya na Nashville Predators na June 2002 maka David Gosselin na 5th round pick na
Nchịkọta afọ 2003. Mann gara n'ihu na-egwu egwuregwu 4 maka ndị Predators.