Paul Duncan and Mike Turkovich, who were part of that 2005 class, were last second add-ons by Charlie Weis, who was scrambling to get some warm bodies in that class' roster. At least those guys earned starting spots, and played a good bit of time.
The only OL that Willingham recruited from 2004-2005 were in the 2004 class, consisting of John Kadous and Chauncey Incarnato, neither of whom saw any meaningful playing time. Incarnato left shortly after Willingham got canned, and Kadous quit football after battling with injuries and illness (the man lost 30 pounds as a result). Kadous was the better of the two, and might have been able to get some playing time, given the situation, but he simply wanted to be a normal student at ND, something I can't fault him for wanting. At least he graduated.
Link: This is how bad those classes were