What's funny is that people have been calling ads on jerseys in the NA Big Four an inevitability for like two or three decades now. When Mariners dreamed up the Turn Ahead The Clock night and brainstormed how jerseys might evolve in 30 years, the first thing thrown out there was "Well, they'll have ads on them" and the response back was "Probably, but we're not doing that for this promotion." And I think the key word there is "evolve." North American sports jerseys aren't turning into NASCAR driving suits overnight. Any change MLB institutes is "a limited radical change" at first and then that thing is gradually increased so it's not overwhelming. Instant replay started with JUST home run calls, then expanded to include a few more things, then added challenges and now it's 17 things. Interleague play was just three windows of specific matchups at first: East vs East, Central vs Central, West vs West. Then after five years, they started the division rotation; then they started making the rivalry matchups six games, expanding the schedule. Then they switched to year round interleague when Houston moved to the AL. Heck, the DH was a one-year experiment that hasn't gone away. It will be annoying at first, like the New Era logo on caps! Then you'll be used to it and it will be "the world didn't end when we added a jersey ad. We can expand the program to batting helmets."