Posted by ESPN.com's Ted Miller
A few weeks ago, some Oregon fans were clamoring for a quarterback change. Now, they may get it when they no longer want it.
Ducks quarterback Jeremiah Masoli, who's been masterful over his last six quarters, didn't practice Monday due to a knee injury he suffered in the second quarter against Washington State and may not be ready for the visit to UCLA on Saturday.
Oregon coach Chip Kelly said Masoli is "day-to-day," which is his standard answer for any injured player. The nature of Masoli's injury also is unclear. The Eugene Register-Guard reported that Masoli was "moving around with a stiff limp and had an ice wrap at one point" on Monday.
If Masoli can't play at UCLA, junior Nate Costa would start.
Costa was slated to be the starter in 2008 before he suffered a major knee injury during the preseason that required season-ending surgery -- the third such knee injury he's suffered.
Costa played well after replacing Masoli against the Cougars. He completed 7 of 9 passes for 80 yards and ran for 26 yards and a touchdown. For the year, he's 11 of 16 for 115 yards with 38 yards rushing.
Kelly said he believes Costa has put his injury history behind him.
"He's over it," Kelly said. "He's taken some hits in the two games he's played. He's scrambled around the pocket and done a nice job. If we have to go with Nate, I've got all the confidence in the world in him."
The Ducks No. 3 quarterback is sophomore Darron Thomas. Thomas saw some quality action last year as a true freshman, most notably while leading a late comeback against Boise State, but the goal is to redshirt him.
Losing Masoli would be a big hit. After a slow start -- a really slow start -- he's completed 35 of 43 passes -- 81.4 percent -- for 369 yards with four TDs and no interceptions over the past six quarters. He's also rushed for 73 yards and a score during that span.
Masoli isn't the only wounded Duck. Right tackle C.E. Kaiser suffered a shin injury against the Cougars and also is questionable for this weekend. If he can't play, Darrion Weems or Nick Cody would replace him -- both of whom are in a regular rotation on the offensive line.
Running back Kenjon Barner (shoulder) and receiver Jamere Holland (knee) also didn't practice Monday, according to the Regiser-Guard, while safety T.J. Ward (ankle) did conditioning drills. Ward hasn't played since the Boise State game but could be ready for UCLA.