Kammala jumla mai zuwa: Morrison na kwalejin koleji ya ƙunshi shekaru hudu a Colorado College yana wasa a WCHA. Shi memba ne na ƙungiyar Century Club na jami'ar, wanda ya ƙididdige fiye da maki 100 na kwaleji. Morrison da Vancouver Canucks suka zaba a cikin
1998 NHL Entry Draft a zagaye na uku, a matsayin na 81 na gaba ɗaya. A lokacin, shi ne na biyu mafi girma na NHL da aka zaba a cikin tarihin wasan hockey na makarantar. Shi ne kuma dan wasan hockey na Afirka na farko daga Los Angeles da aka zaba a cikin NHL.