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John Malone

Team: Atlanta Braves
Net worth: $4.5 billion

The Atlanta Braves baseball team is owned by Liberty Media Corp., whose chairman is John Malone. Between that and his gig as CEO of Discovery Holding Co., he's made a nice living. So nice, in fact, that on Jan. 28, 2011, The New York Times reported that his upcoming purchase of 980,000 acres of land in the North Woods of Maine would make him the largest individual private owner of land in the U.S., leaving Ted Turner, who once owned the Braves, to eat his dust from the distant vantage point of second place.

Malone's business career dates to 1963. He worked in research and development at Bell Telephone Laboratories, and by 1970 he was a vice president at the now-defunct General Instrument, all before turning 30. In 1973 he joined Tele-Communications Inc., where he was president and chief executive officer until 1996. In 2009 Malone, dubbed "Darth Vader" by former Vice President Al Gore for his allegedly hardnosed business practices, gained a 40 percent stake in Sirius XM Radio. His net worth is $4.5 billion, according to The Street.com .

John Malone | Getty Images