Albert Haynesworth
This one is an oldie but a good and it’s also pure gold. However, Washington fans might disagree and should look away now. Haynesworth was one of the best defensive tackles in the league during his time with the Titans. Then Washington decided to bring him to the capital after another Pro Bowl season (via The Athletic).

That was a terrible decision because Haynesworth signed a massive contract before downing tools. He ballooned up in weight and didn’t put any effort into his performances. Long-suffering Washington fans soon lost patience with their big-money free agent. It was a shame for them but Haynesworth laughed all the way to the bank.