I'm pretty sure Chelios is playing hurt. When they were out here in Denver, I went to one of the closed skates (it's good to have friends!) and he was moving very gingerly. After practice was over and they were back in their street clothes, he was moving very very slow. At the time, malt was out with a groin injury, but he was moving 10 times better than chelios.
It looked very much like a groin injury to me, but I'm not a doctor. Even a simple thing like him stopping to sign a puck for me brought a grimace to his face when he turned to face me. I'd bet good money on him having a pretty bad injury.