It seems like just out of happenstance ISU would've had a couple of first-rounders in the past 40-ish seasons. I suppose it's a combination of things, one being lack of sustained, high-level success, although that could be chicken-or-egg question — has ISU been irrelevant because of lack of major talent, or has having a lot of mediocre or worst years water down the visibility of individual players?
Then there are examples like Troy Davis, who had an outstanding college career, but played on bad teams and apparently didn't have the type of game (or size?) seen as transferable to a big-time draft pick. And Iowa State has not had a mega-brand first-round QB, either. (Wallace and Rosenfels were in the neighborhood, but didn't quite get there).
I'm going a little off the top of my head for analysis/explanations.
Then there are examples like Troy Davis, who had an outstanding college career, but played on bad teams and apparently didn't have the type of game (or size?) seen as transferable to a big-time draft pick. And Iowa State has not had a mega-brand first-round QB, either. (Wallace and Rosenfels were in the neighborhood, but didn't quite get there).
I'm going a little off the top of my head for analysis/explanations.