CHARLOTTE, N.C. (AP) - Dale Earnhardt Jr. candidly declared two weeks ago that he has too good of a race team to be worried about making NASCAR's playoffs.Since then, he has produced underwhelming finishes at Daytona and Kentucky and slipped to 13th in the Sprint Cup standings. Earnhardt hasn't scored a top-10 finish in a month and, yes, he is indeed in danger of missing the championship Chase.