Eh those first two aren't the best examples (the third is solid).
Forrest was in a pretty shit situation in the rematch and clearly did not want to be there. He was forced to go down to Brazil and fight Shogun while his wife was expected to give birth and he seemed mentally out of it the entire fight week and checked out after the fight. Plus the first fight wasn't some quick finish but an extended fight that ended in a sub near the end of the third round.
Oh boohoohoo, "Forrest wasn't there mentally"
then maybe he should have quickly subbed Rua again so he could run to his wife as a winner with a nice bonus and his legacy intact.
Better than, from what you say, basically taking a dive because he wanted out of there... which is an insult to a warrior like Griffin.
In the first fight, Shogun had a bums knee (and got surgeries right after the fight), and couldn't even train so he was totally out of shape. Still took Griffin 3 rounds to finish him.
_________________________________
Rua had previously undergone surgery on his torn left ACL in September 2007, following a disastrous promotional debut against former 205-pound champion
Forrest Griffin at
UFC 76 in Anaheim, Calif. Rua also had a follow-up operation on the same knee in 2008.
“The first time he injured his knee was in training, and maybe from years of training, before the Forrest Griffin fight,” said Alonso. “He opted to fight with the injury and ended up having surgery right after. We don’t comment on it very often because we don’t like to take anything away from Forrest.”
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Classy
But sure, the only reason the rematch was a 2min beatdown that ended with Shogun bashing Forrest's face (broken jaw, and broken right foot) in until he signaled to the ref that he was done.
It was all because Griffin didn't have his head in the game. Nothing to do with facing a healthy Mauricio...
Also, Gegard Mousasi vs Uriah Hall
Moose got caught in the first, in a huge upset reminiscent of GSP/Serra 1
Then Hall got tooled in the rematch
No need for a third one