4. The Dominant Offensive Line
The Offensive line featuring Tyron Smith, Ronald Leary, Travis Frederick, Zach Martin, and Doug Free is considered one of the best in the game and this is no accident. Spending first round picks in 2011, 2013, and 2014 on Smith, Frederick, and Martin respectively the Cowboys have invested heavily to have a good run game and keep Tony Romo on his feet. The line was able to stay relatively injury-free for 2014 and if they can repeat that feat, they have the ability to dominate games like typically only a quarterback can.