In what might amount to the most important hire that Coach Walters will make for his first staff at Purdue, he tabbed another young but up and coming offensive coordinator in Graham Harrell. The 37 year old offensive mind has worked under some of the best and impactful offensive minds in college football today in Mike Leach, Mike Gundy, and Seth Littrell. Harrell is well thought of around the country as an innovator himself as he has held an offensive coordinator role at North Texas, Southern California (USC), and West Virginia and his air raid offensive system has evolved from his time at each program.