Biadasz, who suffered a left leg injury in last Saturday's 38-14 victory over Iowa, is listed as questionable along with starting safety D'Cota Dixon, who sat out the game against the Hawkeyes with a right leg injury.
"I knew as an offensive lineman he would be able to block from center," Deiter said of Erdmann. "I just didn't know -- if he was going to be as clean as he was with getting everyone else on the same page. He did a really good job of just directing traffic."
Biadasz left the game after he was injured on a screen pass to Jonathan Taylor on the Badgers' scoring drive at the end of the first half. Biadasz returned for one series in the third quarter before Erdmann took over.
Starting wide receiver Jazz Peavy, who has been sidelined by a right foot injury and is away from the team for personal reasons, remains out along with wide receiver George Rushing (left leg). Coach Paul Chryst wasn't confident in their return.
"Both are out for different reasons but right now I don't see them [coming back] soon," Chryst said.