Williams came off the field holding his arm in the fourth quarter. The injury was initially diagnosed as a bruise, but after the pain persisted Williams was taken for an x-ray and the the injury was revealed as a break.
Williams is expected to miss four weeks, but there is hope that he will make it back in time for the Oklahoma game Oct. 30.
Daniel McLemore is listed as the backup, and came in when Williams missed some of the first half with a cut finger. But OSU head coach Les Miles also mentioned Monday that Ricky Coxeff and freshman Martel Van Zant could see action with Williams sidelined.
"I think (McLemore) and I think Ricky Coxeff (will be in there)," Miles said. "I think we're in pretty good shape there. Martel might play. I think this is the kind of game that he can play pretty comfortably.
"The team as a group, as a whole, has to play a little bigger and a little better when you have a starter not in the game."
Miles said freshman Prentiss Elliott and McLemore would handle the punt return duties in Williams' absence. Elliott had three punt returns against Iowa State, returning one 32 yards to set up a Cowboy touchdown and fumbling the other two, although OSU retained possession of each.
Darrent Williams Sidelined
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