Why is MLB airing ads for salary cap during broadcasts?

Rob Manfred is the commissioner of baseball. (Arturo Pardavila III)
PHILADELPHIA — If you’ve watched a Phillies game or any big-league matchup on MLB.tv lately, you’ve likely seen the commercial.With the collective bargaining agreement between Major League Baseball and the MLB Players Association set to expire after this season, the league has launched an advertisement campaign called “Level the Playing Field,” promoting the idea of a salary cap in the next CBA. Th