Cliff Harris was supposed to be one of the most spectacular playmakers for the Oregon Ducks this season along with athletes like LaMichael James, Josh Huff and De'Anthony Thomas. Unfortunately, it never materialized on the field for Oregon because Harris had too much trouble getting on it.
Harris was suspended by the Ducks before the season, during the season, and was finally kicked off the team after being cited for marijuana possession earlier this year. Harris will thus of course not be on the field against the Wisconsin Badgers in the Rose Bowl, although considering how little he's done this season, it's not likely that he would make much of a difference.
And Oregon has done fine this year without Harris. Redshirt freshman Terrance Mitchell has stepped in and proved to be a more than capable replacement. James and Kenjon Barner are the main punt returners, so I doubt the Ducks have lost any steps in terms of actual playmaking.