Getty Dallas Cowboys cornerback Trevon Diggs. If Dallas Cowboys owner Jerry Jones is truly the world class salesman he’s told us all he is for the last 40 years, there is one truly epic deal out there waiting to be made if he wants a challenge. There is no bigger albatross hanging around the franchise’s collective neck than veteran NFL All-Pro cornerback Trevon Diggs , who has gone from an NFL All-Pro to an unproductive, unreliable player who has what might be the NFL’s worst non-quarterback