6. Roy Williams (The Worst)
Why not just have one Roy Williams on the team when you can have both? Safety Roy Williams was one of the team's best draft picks of the early 2000s, but receiver Roy Williams was one of the worst trades Jerry ever made.
The Cowboys traded a 2009 first, third and sixth round pick to the Lions for Williams during the 2008 season, hoping he would pair well with Terrell Owens.
In seven starts, he only caught one touchdown for Dallas in 2008. The team was hoping Williams would step up in 2009 with Owens gone, but that ultimately never happened. In a game against the Chiefs, he sat out with an injury and Miles Austin had a breakout game with 250 receiving yards, a Cowboys' record for one game. He took a backseat to Austin the rest of the season, who made the Pro Bowl. Williams finished with only 596 yards and seven touchdowns his first full season as a Cowboy.
2010 was more of the same. Williams only managed 530 yards with five touchdowns while Austin and rookie Dez Bryant began to take over as the new starters.
After the season, Williams was released when the NFL resumed following a lockout. His time in Dallas was filled with disappointment considering the team gave up three picks to get him. The picks could have helped Dallas land another key defender or offensive weapon heading into 2009. Jones would like to have this one back.