Well then why is it not happening to every defense in the country, why don't they suffer as many injuries they get tired too...why because sometimes that's just the way it goes. That's why they issue shoulder pads and put in the targeting rule so players will use shoulder pads and not heads. I give up.When you’re tired, you don’t play well and don’t think clearly, you tend to get hurt hitting players with your shoulder instead of having proper tackling technique....