Tim Duncan

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Tim Duncan

Power 100 rank: 20
Sport: NBA/San Antonio Spurs—C
Age: 33
Most recent notable achievement: 2009 All-NBA Second Team
Earnings: $25.7 million
Key sponsors: Adidas, Coca-Cola

Why he's on the list: The soft-spoken center doesn't garner much attention in national endorsements, but players will tell you he is the most respected athlete in the NBA.