That's BS because once Buster went down, you could clearly see he was still coherent when he banged his gloved on the canvas. And prior to the knockdown, that would have been another round for Buster because he was kickin' the out of Mike. That's what you call using the entire nine seconds.
Like I said, Mike's greatest win was against a blown up Light Heavyweight in Michael Spinks. Really not that impressive. Some due to the prison sentence, some due to Don King and some due to Kevin Rooney exiting after the Spinks fight. He knew King had taken.