Offensive Lineman John Urschel Starting PhD at MIT
Retired Canadian offensive lineman John Urschel hired as professor at MIT - 3DownNation
Ravens OL John Urschel retires days after CTE study to pursue Ph.D.
Ravens' John Urschel, lineman and PhD candidate, retires from NFL aged 26, NFL
Grad student John Urschel tackles his lifelong balance of math and football in new memoir, MIT News
John Urschel retires from the NFL at age 26
Who was the smartest NFL player of all time? - Quora
John Urschel: From NFL Lineman To MIT Math Professor
John Urschel, Ravens lineman, retiring from football at 26
Ravens OL John Urschel Retires After CTE Study, Continues Pursuit of MIT Ph.D., News, Scores, Highlights, Stats, and Rumors
Concerned with long-term damage from head injuries, Ravens offensive lineman John Urschel retires