Yeah, I'm gonna say no to that. If Chael were to work the fight, he would have dropped after the first big punch Fedor landed (the first few seconds of the fight). I do think he gave up though - Fedor finished the fight with pretty weak punches - Chael could have made an escape, if he wanted to - I just don't think he wanted to continue. While the fight was short, Chael did try quite a few things in those few minutes - he even got a dominant position once, but was reversed. Basically, Chael wasn't able to do much, while suffering quite a bit of damage - he probably realized that if this were to continue.... it would be pure domination for a lot longer than it had to be, so it's better to submit sooner rather than later.