Vaccinated or not masks should still be widely in use especially by the fall. All this back and forth us vs them crap all boils down to the same common thread. Plain selfishness and a need to get back to "normal" ie doing whatever the hell we want. Even though our planet is showing us each week and month that passes there is no more true normal from here. Americans are just too damn entitled. We all share responsibility for this mess.
It’s about doing everything in their power to prevent games being cancelled and money being lost. Vaccines help greatly reduce (not eliminate) the spread and recovery of getting infected. Is it possible to reduce the likelihood to 0? No, especially with the virus thriving on unvaccinated hosts. Will teams greatly reduce the chance of an outbreak by getting vaccinated? Yes and that’s the current name of the game.