by HumanCockroach » Tue Oct 28, 2014 1:56 pm
Not sure they do know it until after the game. The network called it a sack during the game, but in the official stats it isn't. If I had to guess it would be something they judge based on how the lineman move, and whether receivers are running routes or attempting to block. Just a guess, but that would be my guess. The lineman in this case paused and then fired forward, and the receivers were blocking, not attempting to get separation.