Leeds have sold a minority stake in the club to the San Francisco 49ers' investment group.
Reports say the NFL franchise have invested £10million in the Sky Bet Championship side.
"This strategic partnership enables Leeds United to align with and gain invaluable expertise from the owners of one of the biggest global sports entities," said Leeds owner Andrea Radrizzani.
"The 49ers are an innovative, successful organisation and we are delighted to have access to such a rich source of business and sporting expertise.
"This exciting partnership builds on the foundations we have laid down at the club in the last 12 months and we can assure supporters that the funds invested will go towards improving results on the pitch."
The finale of the American football season generated more than 24 million tweets, Twitter said today.
The 47th Super Bowl was won by the Baltimore Ravens and featured a half-time performance from Beyonce as well as a floodlight failure.
Michelle Obama tweeted about Beyonce's half-time show, which Twitter said saw the peak in activity at 268,000 tweets-per-minute.
Basketball star Kobe Bryant tweeted about the the blackout, which sparked 231,500 tweets-per-minute.
The game's conclusion, which saw the Ravens defeat the San Francisco 49ers, generated 183,000 tweets-per-minute.
The tense Super Bowl game was punctuated by stellar performances from female entertainers.
Destiny's Child reunited for the first time since 2007, Jennifer Hudson joined a choir of children from tragedy-stricken Sandy Hook Elementary and Alicia Keys performed the National Anthem live from the middle of the field.
While many of the stars can earn millions for their performances, the Super Bowl does not pay its entertainers.
“We do not pay,” NFL spokesperson Greg McCarthy told Forbes.com. “We cover all expenses associated with the performance.”
With more than 150 million people worldwide expected to watch the game, the exposure the entertainers gain is deemed payment enough.
Keys posted pictures from backstage at the event to her 11.2 million Twitter followers and wrote: "3 sista's at the superbowl! ;-) Me, @beyonce & @iamjhud! Cheers!! What an unforgettable day!!"
Jennifer Hudson tweeted: "@Beyonce@aliciakeys @kellyrowland u know I love n have n always will admire u ladies . So honored to be amongst u all. Love u guys!!"
The singer then hastily added: "Yes Michelle too!! Just don't know her handle!! All of these ladies make me proud!"
The Ravens rejoiced in a confetti-covered Superdrome after narrowly snatching the title from the San Francisco 49ers, who had staged a remarkable second-half comeback following the stadium's 34-minute power cut.
The 49ers head coach Jim Harbaugh slammed key decisions made by the referees after his team lost 34-31.
He questioned two non-calls in the final series when the 49ers failed to convert with a first and goal as they looked to find receiver Michael Crabtree with the game on the line.
"There's no question in my mind that there was a pass interference and then a hold on Crabtree on the last one," he said.
He was also unhappy officials did not call holding as Ravens punter Sam Koch took a safety and protested the decision to penalise cornerback Chris Culliver for pass interference.
Unusually, Harbaugh's older brother John is the head coach of the Ravens, and the siblings - whose parents attended the game together - shared an awkward hug after the tense game.
Victor John paid tribute to his younger brother after the game:
"There is no greater coach or competitor in the National Football League than Jim Harbaugh. The way the team played proves it. What they have done the last two years is unprecedented."
He went on: "They showed it today, the way they battled back and fought right to the end. That is who he is and who they are. I could not be more proud of him and what he has done."
The Baltimore Ravens have beaten the San Francisco 49ers 34-31 in the Super Bowl XLVII at the New Orleans Superdome.
The Super Bowl is now underway again following a 34 minute power delay.
A power source failure from outside the Superdome stadium caused power delays, according to CBS.
Beyonce performed a set list of her greatest hits during the half-time show of the NFL Super Bowl XLVII football game in New Orleans, Louisiana.