John Urschel, MIT mathematician and NFL offensive lineman, retires from football
John Urschel's retirement was a case of simple math - The Boston Globe
John Urschel: From the NFL to MIT - WSJ
Ravens' John Urschel, lineman and PhD candidate, retires from NFL aged 26, NFL
Ravens guard John Urschel drives an impossibly small car : r/nfl
It all adds up: Lineman John Urschel loves his post-NFL life
Mind and Matter: A Life in Math and Football eBook : Urschel, John, Thomas, Louisa: Kindle Store
Ravens' John Urschel on exploring football, math, why and why not - WTOP News
Ravens' John Urschel makes prestigious Forbes '30 Under 30' list - ESPN - Baltimore Ravens Blog- ESPN
NFL training camp winners and losers: Bad news engulfs Ravens
John Urschel, ex-NFL player and mathematician, on how to find your passion
NFL's biggest problem is just three letters long: CTE
Retired lineman was secretly a full-time Ph.D. student at MIT while with Ravens