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George ForemanForget the Thrilla in Manilla, the former Heavyweight Champion of the World made the most of his money selling Lean, Mean Grilling Machines -- raising the bar for celebrity-backed products the world over

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Oscar De La HoyaA retired professional boxer who has won 10 world titles in six different weight classes, De La Hoya started Golden Boy Promotions in 2002, now one of boxing’s most active promoters

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Michael JordanAlong with his game-changing endorsement deals, the best basketball player ever (sorry, LeBron James) is still in the game as owner of the Charlotte Hornets. Now 52, Jordan claims he can still beat all of his players 1-on-1. Either way, he owns them

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Venus WilliamsThe world famous tennis player was the first black American woman to become No.1. Although she is now No. 11, she became an interior designer in 2002 and founded V*Starr Interior, as well as designing fitness wear called EleVen

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Serena WilliamsVenus' sister is currently ranked the No. 1 tennis player in the world, but that's not enough for her: She has developed a fashion/jewelry line, and is part owner of the Miami Dolphins with her sister Venus

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Tony HawkThe greatest skateboarder of all time recognized that he wasn't going to be the top-ranked one when middle-aged. Hawk wisely turned his name and knowledge into even more dollar signs by starting skating-inspired apparel company, Birdhouse

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John ElwayElway was a Super Bowl-winning QB for the Denver Broncos, where he now serves as General Manager and Executive Vice President of Football Operations. He also owns car dealerships, a steakhouse and an arena football team

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Dave BingThis retired Hall of Fame basketball player went on to found Bing Steel, a processing company that earned him the National Minority Small Business Person of the Year award in 1984

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Roger StaubachThe Hall-of-Fame Dallas Cowboys QB has been raking in the Texas dough another way since retirement: real estate. His Staubach Co. was purchased in 2008 for $640 million

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Vinnie JohnsonNicknamed "The Microwave," Johnson founded the auto supply company Piston Automotive in 1995

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Cal Ripken Jr.Known as the "Iron Man," Ripken played for the Baltimore Orioles and later bought three minor league teams

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Chris WebberWebber owns an investment firm, restaurants and real estate. Not bad for a five-time NBA All-Star

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Wayne Gretzky "The Great One" proved that he is as adept in the food and beverage industry as he was on the NHL ice. Gretzky is a successful restauranteur and winery owner

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Magic JohnsonEarvin Johnson was "Magic" on the court -- and he still is in the boardroom. He now owns a movie theater chain and stake in a sports team ownership group. The Dodgers part-owner is currently trying to bring an NFL team back to Los Angeles

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Maria SharapovaThe tennis beauty probably doesn't eat a ton of candy, but she sure sells it. Sharapova owns Sugarpova, which sells "premium gummy candies." Yes, there are adorable edible mini-tennis balls

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Peyton ManningYou know all of those annoying Papa Johns commercials that the Peyton Manning salvages? There's a reason for those -- the Denver Broncos quarterback actually owns 21 of the franchise's pizza shops

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Shaquille O'Neal: (This basketball all-star owns a number of diverse businesses, ranging from gyms to burger franchises to a car wash and even a night club.

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Lenny DykstraHe started a high-end jet charter company and magazine for professional athletes called the "Player's Club," and also owned a chain of car washes. Unfortunately, Dykstra was charged with credit card fraud, embezzlement, obstruction of justice, filed for bankruptcy and now a convicted felon

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LeBron JamesIn addition to dabbling in acting - he stars as himself in "Trainwreck" - James is part owner of a soccer team

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Arnold PalmerAside from the half-iced tea/half lemonade concoction named after him, one of the best and most-beloved golfers of all-time parlayed his name and talents to golf course design. Palmer also dabbles in hotels

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Dhani JonesFormer linebacker for the Giants, Eagles, Saints and Bengals, Jones started the BowTie foundation, which strives to "foster the personal development of the underdeveloped youth"

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Eddie GeorgeFormer running back for the Tennessee Titans, George majored in Landscape Architecture in college, which led to the founding of his company, EDGE

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Rick MirerMirer played for the Seattle Seahawks, the Chicago Bears and the Detroit Lions, and now co-owns a Napa winery called Mirror Wine Company