Dale Earnhardt Jr.
Power 100 rank: 42
Rank last year: 45
Most recent notable achievement: Won 2010 Subway Jalapeño 250
Earnings: $26.5 million
Key sponsors: Hellmann's, GoDaddy.com, Wrangler
Why he's on the list: One of the most recognizable names in racing, Dale Earnhardt Jr. capitalizes on the family name but hasn't been able to win an elusive Sprint Cup Championship. (His father, Dale Earnhardt, won seven when it was called the Winston Cup Series.) The younger Earnhardt hasn't won a Sprint Cup race since 2008 and triumphed in but a single race last year, the Subway Jalapeño 250.