Dale Earnhardt Jr. top list of biggest disapppointments for 2010

Many of the top stars we expected to shine in 2010 came through in a big way – Jimmie Johnson, Denny Hamlin and Kyle Busch. But some failed to produce the same results they did in 2009, or the results that were expected based on their records and history or the history of their respective teams. Here's a look at the most disappointing drivers in 2010: