Evander Holyfield's scheduled Dec. 9 fight against journeyman Sherman Williams at the Joe Louis Arena in Detroit, which had already been postponed twice, was canceled Wednesday.
Olympia Entertainment, which was promoting the fight, made the announcement but did not specify the reason for the cancelation other than to say it was "due to unforeseen circumstance."
However, previous postponements from Nov. 5 and Nov. 12 were related to lagging ticket sales and the lack of a television deal.
The card was supposed to help benefit Forgotten Harvest, an organization that helps fight hunger in the Detroit area. Tickets will be refunded at the point of purchase.
Holyfield (43-10-2, 28 KOs), a former four-time heavyweight titleholder, continues to fight at age 48 despite a clear degradation of skills, although he ended a two-fight losing streak -- both losses coming in world title bouts -- with an eighth-round knockout of François Botha in April. The fight with Botha was Holyfield's first in 16 months.
Williams (34-11-2, 19 KOs), who has never beaten a name opponent, was coming off a 10-round decision loss to Manuel Charr in Germany in October 2009.
Dan Rafael is the boxing writer for ESPN.com. Follow him on Twitter @danrafaelespn.