Sorry Von, this whole 'swarming' thing doesn't cut it with me. I'd even go far as to say it would be pretty quick. Whoever was up against him would just fend and go in for the shoot. Tyson would have to be (IMO) pretty lucky to land a punch on the button as someone was coming in trying to take him down. He's not used to it...once he's down then he'd be like a lamb to the slaughter.

Knowing tyson, once he was down he'd probably realise this and bite a chunk out of the guys clavicle or something.

Hate to say this but i think even Royce Gracie circa 92-93 would have little trouble putting tyson away in less than 3 mins. All they would have to do is fend as the shoot came in, once he's within clinch/takedwon range its basically all over. Tyson would then resort to primal instinct and the streetfighter in him would take over.

He'd get Dqed or soundly handed his ass in an MMA match.

Now if tsyon cross trained...well, thats another story.