Target: Dan Williams, Defensive line
2014 stats: 38 tackles, 1 sack
The 6-3, 330-pound tackle is the definition of a run-stuffing machine for the Arizona Cardinals in recent years, and the Cowboys would know as he had his best game of the season in the Cardinals' Week 9 win over the Cowboys.
Williams is a beast in the middle, and while his stats might not be eye-popping, the great run-stuffing tackles' stats often are not. He's constantly absorbing double-teams and letting his teammates make plays, and it worked for the Cardinals, who had one of the league's best defenses, especially against the run.
Williams is a free agent and will cost money, but it looks like the Cowboys might be in a better position to spend this offseason than in recent years, so he'd be a good place to stop.