Pedzisa mutsara unotevera: Yakagadzirwa kubva kuQuebec Major Junior Hockey League (QMJHL) 22nd yakazara mu
1998, Gagné akatamba majors junior neBeauport Harfangs neQuebec Remparts kwemwaka mitatu. Akatanga basa rake reNHL neFlyers muna 1999 uye akatumidzwa zita reNHL All-Rookie Team. Iye akaonekwa muna NHL All-Star Games maviri uye akahwina maviri Bobby Clarke Trophies pamwe Flyers sezvo chikwata MVP.