MSNBC Live with Tamron Hall 03/17/15

NFL linebacker retires at 24 years old, cites concerns over long-term brain injury

New York Giants Hall-of-famer Linebacker Harry Carson and The Nation Sports Editor Dave Zirin weigh in on the stunning announcement by San Francisco 49’ers Linebacker Chris Borland, who’s deciding to retire at 24, citing concerns over long term brain inju ... more Duration: {{video.duration.momentjs}}