Fans running onto the field of play is nothing new in sports, but a player getting involved is rare.  Braves outfielder Matt Diaz apparently grew tired of a fan, dressed in a red body suit, running around on his field:

I love that he tripped that idiot!  Although, I wish he would have tackled him instead.  I know that players are not supposed to get involved when a fan gets onto the field, but have you seen the size of some of these players, especially outfielders?  If you saw a fan get demolished by Adam Dunn, would you think about running onto the field?  I don't think so.  Nice job Matt.

Oh and Philly fan in the red suit, you are no Charlie Kelly: