The Dallas Cowboys, along with the rest of the NFL, will begin their quest for a Super Bowl with the start of training camp on Monday. The team has made a few splashes this offseason, including a trade for wide receiver George Pickens, but is there a market for the front office to trade assets during the preseason? Here are four candidates the Cowboys could trade during camp. Running back Deuce Vaughn may be the odd man out when it comes to the backfield in Dallas.