The English Premier League is already full of American dollars but more could be on their way with one of Europe's most successful soccer teams on the market.
John W Henry leads Red Sox's Fenway Sports Group (FSG) in running Liverpool FC, the Glazer family, who also own Tampa Bay Buccaneers, are in charge at Manchester United.
Arsenal are run by an American with Super Bowl-winning Rams owner Stan Kroenke in charge while San Francisco 49ers' owner Jed York has a minority stake in Leeds United.
Teams at the top of the soccer world in England rarely get put up for sale and so it has put many of America's billionaires on alert ahead of the March 15 deadline for offers.