7. Malcom Glazer

Net worth: $4.5 billion

Malcom Glazer funded the Tampa Bay Buccaneers' successful Super Bowl XXXVII victory but it was his move to buy Manchester United that attracted the most interest.

The 85-year-old bought 98 percent of the Red Devils in June 2005, but the refinancing of the club seven months later caused uproar amongst supporters.

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