Marlon Lucky? Are you serious? Where were you last year? What are your standards? Does the guy have to win a Heisman? He didn't blow up in his first two years quite like we expected, but he was awesome last year.
I would say Harrison Beck was the biggest bust during the last 10 years. Harrison Beck was a 5 star QB, won a few quarterback camps etc., and then came to Nebraska and went 1 for 10 with 1 interception. His best play was taking a late hit against K-State. He is now a shaky backup at NC State. If that's not a bust, I don't know what is.
I don't really count guys who get injured as busts. That's not really fair.
I wouldn't normally include him in this conversation, but David Horne was a pretty big bust. I went to high school for 2 years with him (at Prep before he switched to Central) and he was a 4 star RB that never did much. He just COULD NOT STOP SMOKING WEED. I think he got the boot after his 4th citation for the stuff. Too bad- he really was a good RB.