Tell that to Michael Bisping who KO'd the middleweight Champion Luke Rockhold. GSP basically 1 shot Bisping with a left hook. Bisping > Till.
Lol @ bringing up a Matt Serra finish when talking about the 9 title defense GOAT
Since you went real far back to dig into the GOAT's history, tell me, did something as bad as this happen to GSP?
I don't recall GSP ever being brutally knocked out! See two people can play at that game of 'lets point to the losses'. I can also show you a loss where Rory absolutely clowned Woodley and picked him apart, GSP > Rory.