The Cowboys have many needs as they enter the 2013 NFL Draft. As they enter the Draft their biggest need is likely the offensive line, but in my latest Mock Draft, I have the top offensive linemen coming off the board before the Cowboys pick at number 18 overall. Since the top offensive linemen are off the board, the Cowboys should look for a Defensive Tackle in Round 1. The Cowboys need a top Defensive Tackle because they are making a switch from the 3 – 4 defense to the 4 – 3 defensive scheme. This switch alone means that the Cowboys have a void at the Defensive Tackle spot, but they also have a great need because their projected started is Jason Hatcher, which is an undersized player for a Defensive Tackle who plays mostly “5 technique in the 3 -4 scheme and will be forced to move to a “3 Technique” lineman in the “Tampa 2″ System. The players the Cowboys would like to fill the role of the other interior lineman spots were Josh Brent and Jay Ratliff, but both players were involved in drunk driving episodes during the 2012 season and the 2012 offseason. This leaves their status undecided and therefore a major hole in the Cowboys roster. The “Tampa 2″ scheme relies on getting pressure from the front four, so the Defensive Tackle needs to be a position of strength for the defense to act properly.