2. Danny Amendola
The Cowboys are a machine when it comes to identifying talent in the undrafted free agent pool. Hall of Famers Drew Pearson and Cliff Harris, and Pro Bowlers Miles Austin, Mark Tuinei, Bill Bates and Tony Romo are just some of Dallas' most notable UDFA success stories.
Amendola could've been one of them.
The two-time Super Bowl champ was famously cut on Hard Knocks and re-signed to the Cowboys' practice squad, where he spent his entire rookie season. Amendola eventually signed with the then-St. Louis Rams in 2009 and almost instantly became an impact player.
Two years after he signed with Dallas, Amendola caught 85 catches for 689 yards and three touchdowns for the Rams. He was never a high-volume receiver, but he was vital to two Patriots' Super Bowl runs and always a reliable outlet for Tom Brady in high-leverage situations.
After failing to carve out a role on the Cowboys, Amendola enjoyed a lengthy 13-year career. Makes you think what could have been in Dallas.