N.F.L. player A.J. Tartly retires at age 23, citing concussions

Read Full Story:

A. J. Tarpley, a linebacker with the Buffalo Bills, said Wednesday that he was retiring because of repeated concussions, the latest young player to walk away from football because of worries about his long-term health.
Bills announced his retirement from the NFL after only one season. ... Read Full Story:
 N.F.L. player A.J. Tartly retires at age 23, citing concussions