Look back over the last 20-25 years or so. The data has got to there, they could categorize it, chart the who/what/when/where, compare it all to training regimes and diet, track the growth of size/speed in players with injury and reoccurrence, weight lifting programs, machines used, look at player condition/history prior to their college career, graph offenses and defenses by team and type versus when injuries occurred, field and weather conditions at the time, the whole shmear. Then compare that data to year over year and against the D1 mean. It's a lot of work, but hey, that's what PhD is supposed to be about, right?