Walker had an immediate impact for the Irish, rushing for a freshman record 786 yards in 2004. He hit the end zone seven times on the ground, and hauled in 10 passes for 74 yards out of the backfield. As a sophomore, he rushed for 1,196 yards and three touchdowns, and added 43 catches for 351 yards and two touchdowns through the air. Walker went out with a bang as a junior, with career highs across the board. He ran for 1,267 yards and seven touchdowns, along with 56 receptions for 391 yards, and a touchdown.
Walker brings some versatility to the running back spot. He is a threat as a runner and receiver. As a rusher, he is a tough interior runner that keeps his legs moving to fight for extra yardage. He has the quickness to hit the hole, and to make the first defender miss. Walker really developed into a receiving threat over his career, and is now a viable option out of the backfield. He has been very durable over his career in South Bend.
Despite the numbers he has posted in college, Walker does not have one true standout physical ability. He has average size, and will not be able to be a true interior runner unless he bulks up. He also lacks the second gear to turn the corner and run away from defenders.
With his ability as a runner and receiver, Walker will find a home in the NFL. He may have limited upside because he may not be a feature back, and lacks the explosiveness to make the big play. He could still be a solid back to have in a rotation and as a threat on third downs.