Say what you want about the immediate impact of Ezekiel Elliott and Dak Prescott on the Cowboys' return to prominence -- the team's recent success has been fueled by dominance from the offensive line. The Cowboys' quintet demolishes defenders at the point of attack in the run game, resulting in huge lanes for the NFL's reigning rushing king, while also providing a cocoon of protection for the 2016 Offensive Rookie of the Year on passing plays. Tyron Smith, Travis Frederick and Zack Martin are all former first-round picks -- and all three were named first-team All-Pro in 2016. La'el Collins was a first-round talent in 2015, but he went undrafted after his name cropped up in a murder investigation (although he was never considered a suspect and was never charged with any crime). The Cowboys scooped him up as an undrafted free agent, and now he's in line to be a full-time starter in 2017.