NASCAR Nextel Cup Series driver Dale Earnhardt Jr. stopped in Las Vegas today on his way to the next race and  played blackjack at the MGM Grand Hotel & Casino against four lucky fans who won contests on local media outlets for the right to join him.  Earnhardt Jr. (left) is seated next to eventual winner Jared Secondine of Las Vegas (right).  Secondine won two three-day passes to Las Vegas Motor Speedway's exclusive Blackjack Club for the March 11 NASCAR Weekend.  Earnhardt also played against Joey Sustrick, Jason Lauer and Jim Gostomski, all of Las Vegas.