Quarterback for NFL football - what's with the new green dot?

There is a green dot? I haven't seen it.

Yes, i have seen that same green dot as well, i think it has to do something with the microphone -- he is the only player wired in.

The green dot is the result of a new rule - a green dot helmet indicates that the helmet is wired with a radio for calling in plays to the quarterback.

How about defense and speical teams? or does this mean only the team driving the ball can have a playered wired with a mic?

I have not seen any defense or Special Team players with the Green Dot.

can someone provide additional clairificaiton?

So you are saying only "two-way" communication. Any other player can be wired up for one-way?

I didn't' realize that their radios were 2 way, I always thought they were just one way communication.

They are not 2-way yet. Only one-way communication is allowed on the field. Players can only "hear" coaches.

Thanks i was wondering that same thing,my 14 year old son thought it was so the quarter back would not get a late hit in the back after the ball was released.i am so glad i can learn new things everyday.

That indicates that the person wearing that helmet has a radio for coaching staff to send in calls etc