Sports | NFL 23-Year-Old Leaves NFL Over Concussions AJ Tarpley is walking away to preserve his health By Evann Gastaldo Posted Apr 7, 2016 2:35 PM CDT Copied In this Jan. 3, 2016, file photo, Buffalo Bills linebacker AJ Tarpley (59) makes an interception on the final drive against the New York Jets to clinch a 22-17 Buffalo victory in Orchard Park, NY. (AP Photo/Bill Wippert, File) A 23-year-old is walking away from the NFL because of concussions. AJ Tarpley, a second-year linebacker on the Buffalo Bills, announced on Instagram Wednesday that he's had four concussions, two of them suffered last season, and has decided "after months of introspection" and research to retire from the sport in order "to preserve my future health." He called it the most difficult decision he's ever had to make, the Buffalo News reports. Read These Next RIP, Chuck Mangione. The police files in the Idaho murders are extremely unsettling. Will we be calling 'artificial intelligence' something else? Doctors allegedly played "music bingo" as a man died. Report an error