Funny you bring this up; this is actually an emergent legal and ethical hot topic in games after Ninja Theory (the developers of Hellblade: Senua's Sacrifice) recently got into a lot of
PR hot water over the idea that they might be using AI-generated voices to bring their characters to life in Hellblade 2: Senua's Sage. Fans of the series were extremely upset at the idea that Ninja Theory would not pay real humans to voice the characters in the upcoming game; the company has denied they were ever doing this, though they do have a commercial license for an AI voice acting technology.
Voice acting unions, to the extent that they exist, also vehemently oppose the use of using technology to digital re-create human voice acting performances, and increasingly more voice actors are part of large unions such as SAG-AFTRA to ensure their professional futures and protect their likenesses. For example, well-known voice actor Troy Baker is now in SAG-AFTRA.
I'm not sure how much unions would affect Madden NFL or other sports games because I kinda doubt commentators are represented by unions. I do imagine there
would be murky area with digital likeness law; Disney recently had to secure an agreement from James Earl Jones to use AI to generate his voice for Darth Vader in future Star Wars projects. Madden is easily a big enough entertainment property that I doubt any well-known football play-by-play voice who would lend sufficient authenticity to the game's audio would sign away his voice likeness rights into perpetuity without proper financial compensation.