Baseball????

So I turned over to the baseball game, ya know, the one with the Evil Empire against the Red Sox... and there are police in riot gear pouring out of the dugouts to line the area in front of the stands. I can't tell what the score is.

What the heck is going on? What inning is it? Why did the police come out in force? This is one of the strangest things I've ever seen.

Ah, finally. It's the top of the ninth, Sox are up 4-2... I think I may understand the caution. Maybe. It's still very odd.