NASCAR teams have hired a top antitrust attorney in their revenue dispute. Here's what it means

The NASCAR season is under way, with 38 races to determine another stock car racing champion in the 76th season of the top motorsports series in the United States.

There is a serious problem for NASCAR and its teams: Negotiations on a new revenue-sharing model have deteriorated. In mid-February, representatives from five teams told The Associated Press they have hired top antitrust sports attorney Jeffrey Kessler as an adviser..

The move was a power play by the 15 teams holding the 36 charters that guarantee entry into every race, a message that they won't be bullied in the negotiations. Here's what to know about this off-the-track brawl with millions at stake: