Posted by ESPN.com's Adam Rittenberg
Robinson, the Big Ten's fourth leading rusher (78.6 ypg), suffered a sprained ankle in the win against Michigan State. The redshirt freshman has started the last seven games for No. 4 Iowa. True freshman Brandon Wegher is listed as the starter, with Paki O'Meara as the backup.
Junior offensive lineman Julian Vandervelde is back in a starting role following a leg injury to right guard Dace Richardson. Vandervelde will start in Richardson's spot, with Dan Doering serving as his backup.
The good news for Iowa is Brett Greenwood remains on the depth chart at starting free safety. Greenwood had to be carted off the field after a nasty collision with teammate Tyler Sash against Michigan State.