Bobby Fischer (who many regard as the greatest chess player of all time) 2 weeks before he became the World Champion, 1972. He retired 3 years later & forfeited the title at age 32.
World Chess Federation offered Fischer $3.5M ($21M today) as prize money to return & defend his title, but he refused.
Oasis founder Seth Fischer said his activist fund has increased its stake in Nidec to become the largest shareholder, adding heft to its call for the troubled Japanese motor maker to consider a sale.