To the guy who thinks that Mir isn't a formidable bjj foe, are you nuts??? ...And Mir has a much more proven ground game than Machida. Agreed that Michada is probably the best pound-for-pound stiker in MMA, but he'd have to knock out Brock with one shot to win. Brock would charge at him, maybe taking one shot which would likely bounce right off his massive head, then take him down. Once 290lbs of Brock is on top of little Machida, any bjj skills would be quickly out the window. This is actually a stupid debate. That fight would be silly. Brock would probably kill him in about a minute. Think about it. Machida couldn't finish BJ Penn. If Brock were to fight BJ Penn, it would be like a big man beating on his little wife. Guys let's chat about something worthwhile. How about Brock vs. Fedor or Carwin. Those are good conversations.