After Wayne Gretzky won the Stanley Cup, he was offered 25% of the @Canucks and a huge raise.
He declined. The rest is history.
The deal would have netted Gretzky roughly $8 million per year (adjusted for inflation) and his portion of the Canucks would have been worth $330 million today.
It is estimated that Gretzky has a net worth of $250 million with only about a fifth of that coming from his salary and the rest coming from endorsements.
While Gretzky was able to win multiple Stanley Cups in Edmonton, he missed out on hundreds of millions to do so.