On Wednesday (July 8), Tottenham announced a deal that will see the club host two NFL games a year for the next 10 years.
It's all part of plans for their new 61,000-seater stadium coupled with the burgeoning popularity of American Football in the UK.
"Anyone who has seen American Football at Wembley Stadium cannot fail to have been thrilled by the spectacle, and the wise heads that run the NFL have clearly not missed the fact that Londoners are going absolutely gangbusters for Gridiron," Johnson said.
It was just the latest in a long list of examples of why he maybe shouldn't have anything to do with sport.
Here are the others:
Calling table tennis Wiff Waff
"Ping-pong was invented on the dining tables of England in the 19th century, and it was called Wiff-waff! And there, I think, you have the difference between us and the rest of the world. Other nations, the French, looked at a dining table and saw an opportunity to have dinner; we looked at it and saw an opportunity to play Wiff-waff. And I say to the Chinese, and to the world, that Ping-pong is coming home!"
Getting stuck on a zip wire
Not technically sport but it was hilarious!
And up close..
Saying this about female volleyball players
"As I write these words there are semi-naked women playing beach volleyball in the middle of the Horse Guards Parade immortalised by Canaletto. They are glistening like wet otters and the water is splashing off the brims of the spectators’ sou’westers."
Getting football wrong
He once claimed England’s 1966 World Cup-winning hat-trick was scored by captain Bobby Moore, a defender. When told by radio presenter Nick Ferrari the correct answer was Geoff Hurst, Johnson blustered: “I was only two!"
Boris trying the Mobot
A charity football match in Reading saw England take on Germany, and Boris 'challenge' his opponent Maurizio Gaudino.
We can't work out how this happened either...
Perhaps cycling's his sport... or not!
But sadly not a Boris bike.
To enjoy a bit more of Boris, check out our 11 great gifs of the man himself.