I cannot give you a year, but it use to be when in OT you played an entire quarter, basically a 5th quarter (I know it's no longer a quarter then, but hey it's not my call )
If they were still tied (in the playoffs) you would go another.
I remember KC and I think it was Miami back in , oh , I'd say the '70's played what seemed like forever.
Jimbo
Jimbo,
Is that the Christmas Day playoff game you're referring to?