[EDIT] Oops, I didn't see this was already posted by Brian: http://mgoblog.com/content/stupid-knees
After John Ferrara moved to the offensive line, there were questions about why it was necessary. The reason? Corey Zirbel appears to be out for (at least) the season:
The position move comes on the heels of the realization that guard Cory Zirbel likely will miss the season with a knee injury.
"It's pretty significant," Rodriguez said. "We're not even hopeful he'll be able to return this year."