I was watching the Detroit/NJ trippple OT game last night with a bowl of Skunk and actually wrote down this question to ponder in the morning. "Guys are fouling out left and right. lets say we are in the 5th OT and ALL the players on the bench have fouled out. Score is still tied. One of your players on the floor commits his last foul and fouls out, you can't bring no one in and you are left with 4 players on the floor. Do you instantly lose the game or can you play with 4??