I think if I can understand that then I'll understand what happened to him.

No I just want to see if another coach can find better ways to use his 4.3 speed because this much I KNOW, ain't no one in the NFL EVER going to catch up to him in the open field.

I’ve said this before, but since it’s the perfect answer to your question...

Tavon is a track star masquerading as a football player. He’s got great straight line speed but football is not a straight line game.

He can’t catch.
He can’t run good routes.
He apparently can’t master the playbook.
He can’t read D’s.
He misses audibles by his QB.
He has a small catch radius.
He doesn’t catch the contested balls.
Even on his jet sweeps he tends to look for the sideline when an inside cut would gain more yardage.
He flamed out as a PR and a KR and Pharoh Cooper far exceeded his efforts.

Ummmmm...

All the above explains how the “NFL caught up with him”.

Look, Tavon’s a nice guy and I wish him the best. But that trade up to get him and then later to extend him were two monumental mistakes. Not gonna sugarcoat it.