The NFL is challenging Nielsen’s ratings accuracy, with chief data and analytics officer Paul Ballew telling the Wall Street Journal the firm is “systematically undercounting” millions of viewers. Nielsen countered that its new “Big Data + Panel” product—combining set-top box data with digital signals from 45 million homes—makes this season the most accurate yet. The dispute highlights mounting pressure on Nielsen as streaming reshapes sports viewership. While rivals gain traction, Nielsen remains the dominant measurement firm, but slow integration of first-party data from streaming services leaves major partners like the NFL frustrated. The debate underscores urgency in modernizing TV ratings.

Chairman Martin Gruenberg faces calls for his resignation.