Aldon Smith
Smith was a fabulous player during his prime but alcohol abuse destroyed his career. He had brilliant moments for the 49ers and became the quickest NFL star to reach 30 career sacks. But his dysfunctional life off the field and his partying created trouble that he could have avoided. Smith failed to maintain discipline and couldn’t balance his lifestyle.

There were multiple DUIs as well as a nasty drunken domestic violence incident. Meanwhile, he suffered a stab wound after trying to stop a fight at a party. Many athletes should stay at home and watch Netflix but Smith had no chill. Instead, he put himself in stupid positions and paid the price. He also received jail time and a bar ban after a 2018 hit-and-run (via Sportsnaut).