Kraft owns American football side New England Patriots and Major League Soccer outfit New England Revolution.
And the businessman - who is founder, chairman and chief executive of the Kraft Group - was strongly linked with a bid to buy the Reds before the Merseyside club was taken over by fellow Americans George Gillett and Tom Hicks for %uFFFD470million in 2007.
However, Gillett and Hicks are rumoured to be unsettled on Merseyside following Liverpool's lacklustre form and a much publicised bust-up with manager Rafa Benitez regarding the club's January transfer policy.
Dubai International Capital are thought to remain interested in a bid to buy out Gillett and Hicks, after withdrawing from the race to own the Reds last year, and Kraft has now hinted that he could also consider a takeover at Anfield.
"We haven't ruled it out completely," Kraft told Sky Sports News.
"But I'm worried a little bit. I want to be able to win whatever we do. But there are no rules in terms of spending on players.
"We would never want to be in a business where we couldn't compete and right now some of the structure doesn't allow you to compete on a level playing field."
And Kraft admits he has met with David Moores, who was Liverpool chairman before selling his stake to Gillett and Hicks and is now a director at Anfield, in the past.
"I spent a lot of time with Mr Moores and his group in Liverpool and we know something about building an opportunity," Kraft added.
"The fan base in Liverpool is a lot like the fan base of the Patriots when we bought them.
"They are dedicated fans if you give them a quality product and they know you are doing their best to win."