He played college football for the Oregon Ducks and was selected by the Seattle Seahawks in the second round of the 2002 NFL draft.

He then went to the University of Oregon, where he became the starting running back and helped the Ducks to a 2002 Fiesta Bowl victory.

In the Fiesta Bowl, he ran for a highlight-reel 49-yard touchdown, during which he landed on top of a defender and got up without touching the ground.

Alexander told the Seattle Times on August 17, 2006, that Morris could start for at least ten different teams in the NFL and could produce a thousand rushing yards and eight or nine touchdowns if given the opportunity.

When the Seahawks signed Julius Jones and released Shaun Alexander prior to the 2008 season, it appeared Morris would be the backup again.