In addition, Bedford's Matt Skelton defends his Commonwealth heavyweight crown against Reading's Michael Sprott.
Eric Sprott from Canada has a trust fund that people can buy that I recommend.
"All credit to Michael Sprott because I didn't see the shot coming, " he said.
Investors who are leery of SLV should look into the Sprott Physical Silver Trust (NYSE: PSLV).
Life is a gamble but I will take that gamble to fight Audley Harrison and Michael Sprott.
And when exactly the same thing happened early in the fifth local hero Sprott dropped his hands to complain.
And Sprott insisted that a rematch with Harrison was not on the cards.
Harrison began well and floored Sprott with a solid combination in round one.
But Williams kept going, launching a huge left hook to Sprott's undefended chin which sent him sprawling to the canvas.
The 30-year-old Londoner controversially floored his opponent while Sprott was protesting a low blow but the referee stopped the fight.
But Sprott made it to the bell and came out strongly in the following round before shocking everyone in the third.
And former Olympic gold medallist Harrison insists he will hang up his gloves if he loses against Michael Sprott at Alexandra Palace.
BBC: Audley Harrison faces Michael Sprott for European title
On the same card, Audley Harrison will fight Belfast's Martin Rogan, his first fight in Britain since losing to Michael Sprott last February.
He started confidently enough against Sprott and looked on course for a quick win after putting the Reading man down in round one.
But in February he lost a European title fight against Turkey's Sinan Samil Sam in Berlin, while Sprott won all eight fights since.
Williams beat Sprott in the seventh round when the pair first fought for the titles at Bethnal Green's York Hall 18 months ago.
Sprott looked to be gaining an advantage but he was checked by a count late in the fourth round after taking a low blow.
In his first fight since a knockout defeat to Michael Sprott last February, Harrison looked cautious but made a weight advantage of two stones count.
Sprott, who beat Harrison three years ago, is the replacement for Poland's Albert Sosnowski, who pulled out of a proposed title bout earlier this month.
BBC: Audley Harrison faces Michael Sprott for European title
The card also features Amir Khan v Willie Limond for the Commonwealth lightweight crown and Matt Skelton v Michael Sprott for the Commonwealth heavyweight title.
Harrison, 35, was knocked out in the third round by a huge left hook from Sprott and has now lost three fights in 14 months.
But the Londoner, who was knocked out in the third round by Reading's Sprott last year, looked far from impressive in disposing of the American journeyman.
But Sprott landed some good jabs in the following two rounds before delivering the telling blow to set up a world title eliminator with Matt Skelton.
Worse was to follow in January this year when, having regained his British and Commonwealth crowns, he lost them in a controversial points defeat to Michael Sprott.
Skelton swarmed all over the technically-superior Sprott for 11 and a half rounds before bringing him down and Williams will be playing a dangerous game going toe-to-toe.
Harrison, who has lost four of his last eight fights, said the prospect of gaining revenge over Michael Sprott, who knocked him out in 2007, was another spur.
The 1998 Commonwealth Games champion reignited his career by winning Prizefighter last year and then scored a 12th-round knockout against Michael Sprott to win the EBU heavyweight title in April.
Sprott, 35, won by a stunning third-round knockout when he met Harrison for the European crown in 2007, but the Bedford fighter has lost four of his last six fights.
BBC: Audley Harrison faces Michael Sprott for European title
In as much, Canadian Eric Sprott, whose Sprott Inc. has precious metals trusts listed in both the US and Canada, took a 45% hit, knocking him off the list.
After 19 straight victories, Harrison was first defeated by fellow Brit Danny Williams, then American Dominick Guinn, before being flattened by Reading's Sprott last February and booed out of the ring.
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