Yes, MM was the one repeatedly yelling 17 you, Phillies fans were just giving him the business because he took the time to share his love via twitter for the cheating Stros and saying that they were going to win (which they should have).
First of all, if you know you know. If you're some kind of uber wealthy guy/celebrity, you might as well go to the game in your team's jersey - enjoy the game and keep your mouth shut before, after, and during the game.
Unless you want to invite conversation/confrontation.
Don't talk no ****, want be no ****.