Associated Press - March 23, 2010 10:29 AM ET
CONCORD, N.C. (AP) - Dale Earnhardt Jr. says his profanity-laced rant at Bristol Motor Speedway stemmed from frustration from a speeding penalty.
Earnhardt had just cracked the top five in Sunday's race when NASCAR flagged him for speeding on pit road. He vented over his radio for several minutes, and snapped at crew chief Lance McGrew's attempt to calm him down.
The penalty dropped Earnhardt to 26th, but he rallied to finish seventh. He moved up five spots in the standings to eighth.
NASCAR's most popular driver says the speeding penalty infuriated him because he had worked so hard to crack the top five.
Earnhardt is in the midst of a 62-race winless streak.