Baltimore Ravens offensive lineman John Urschel, a doctoral candidate in applied mathematics, abruptly announced his retirement from football at the age of 26 on Thursday, just before the first full-team practice of training camp. His decision, which was announced by the Ravens, comes two days after a medical study indicated that chronic traumatic encephalopathy (CTE) was found in nearly 99 percent of deceased NFL players' brains that were donated to scientific research. read more http://www.espn.com/nfl/story/_/id/...fensive-lineman-john-urschel-retires-abruptly
