I get your point however how "under the Radar" was Bradford if he ended up at OU. How under was Reising when he ended up at Kansas. They may be under the recruiting experts radar but not the coaches. Coaches will find everybody.
If they can find Applington Parkersburg. If they can find Ruthven, Iowa (Loren Meyer) . Then they can find anyplace that has a player.
The only real under the radar guy I can remember is Wesley Johnson. He was under the radar because he bounced around so much and commited to a crappy basketball school and people forgot about him.
The other guys are just guys who get to the school and are better than everyone thought they were. However most of them have talent.
Compare the schools that were going after Bradford (OU, A&M, Oklahoma State, ISU) or Todd Reesing (Kansas, Duke, Northwesterm, TCU) versus the schools that had offered someone like Terrelle Pryor (Ohio State, Michigan, Penn State, Florida)
Don't get me wrong, good schools went after each of these guys, but Pryor's list reads like a Who's Who of football royalty. It's absolutely obvious that guys like Bradford and Reesing were less known, and fewer schools got a look at them. That is the definition of "flying under the radar." It doesn't mean that nobody knows who they are. It just means that they were overlooked for any number of reasons.
And it's not like either of these two took a huge amount of time to develop. Bradford was producing his freshman year. Reesing was a sophomore when he broke out. Knowing then what they know now, don't you think that more schools would have made a push to sign these guys when they had the chance? Of course. So why didn't they? Because they weren't aware of them.
How many schools truly have a nationwide recruiting base? Very few. It's impossible to keep tabs on that many players.