You do realize that GSP finished BJ Penn right? It is listed as a TKO corner stoppage but we all know it is submission. Either way it was a beating so bad that the opponent refused to continue.
To answer your question about why GSP would go for the finish if he has Jonny tired out is the very fact that Jonny has one punch KO power beyond anything any of his other opponents have had. Koscheck has KO power but is Super predictable and easy (for GSP) to neutralize. I don't think Georges wants to give Hendricks any extra time to try to land a kill shot. GSP could finish him in the 3rd or 4th TKO from GnP.
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