Everyone has their opinion of the definition of a bust, but mine is a very highly ranked recruit who never did anything on the field. So for me that eliminates Simmons and Hadnot. When they were in the field they were every bit as good as our Heisman winners. Phil Brown was a good RB, but when Hadnot came in you just went Wow. Unfortunately they couldn't stay on the field for different reasons.
Simms was not a bust to me because he was a very good QB that had 1 really bad game. No one could've lived to to the hype, just like Quinn and maybe Arch. Gilbert was not a bust because he never had a chance to develop at Texas, but went on to be a difference maker at SMU and play in the NFL. That's not a bust. The same applies to Malcolm Brown. He may have played behind the worst OL in Texas history and averaged almost 5 ypc. He often was hit in the backfield and dragged 3 guys forward for a 3 yard carry. And he also went on the play in the NFL. That's also not a bust. J. Gray was though.
Alfio Randle is the model for a bust, but so were Edorian McCullough and Marco Martin. Two high 5* that came in with Mack's #1 class and never did anything. Martin was a DT that supposedly ran a 4.5 forty. McCullough was the fastest guy in the state and maybe the country.
Ash and Pickryl were also not busts to me because both showed promise, but had career ending injuries, just like Simmons. Also Gabriel Floyd.