Premise: Aubrey Joseph "A. J." Tarpley, (born April 30, 1992) is a former American football linebacker in the National Football League (NFL). He was signed by the Buffalo Bills as an undrafted free agent in 2015. He played one season with the Bills before announcing his retirement at the age of 23, citing concern over concussions. Tarpley played college football at Stanford.
Hypothesis: Aubrey Tarpley stopped playing professional football in 2016.