http://www.sciencemag.org/news/2019/05/former-football-pros-die-faster-rate-baseball-veterans-and-reasons-are-surprising

A new study finds that, in general, former National Football League pros die earlier than their baseball-playing peers.

The men competing in the National Football League (NFL) and Major League Baseball (MLB) are some of the most elite athletes in the world. But their death rates differ markedly, a new study of thousands of former pro athletes has found. Former pro football players had a higher overall death rate than baseball veterans and were felled by cardiovascular disease and neurodegenerative illnesses at strikingly higher rates than their MLB peers. On average, the football players died 7 years earlier than MLB players, the research found.