John Urschel, MIT mathematician and NFL offensive lineman, retires from football
John Urschel - 2012 All-Big Ten
John Urschel recounts his journey from the NFL to MIT
Baltimore Ravens' guard John Urschel is a math whiz
NFL: John Urschel retires from Baltimore Ravens
FMIA Week 13: 'Seven Shots'—How T.J. Watt And Steelers Kept Playoff Hopes Alive By Stopping Ravens Late - NBC Sports
Ravens center John Urschel accepted into PhD program at MIT - NBC Sports
Concerned with long-term damage from head injuries, Ravens offensive lineman John Urschel retires
From the NFL to MIT: The Double Life of John Urschel
John Urschel on Giving Up Football for a Ph.D. in Math
John Urschel, ex-NFL player and mathematician, on how to find your passion
Ex-Raven John Urschel says retirement about math, not concussions
NPR Interview: John Urschel, Author Of 'Mind And Matter' : NPR
Ravens guard John Urschel starts work on Ph.D. at MIT