I dislike Ortiz with a passion. With that being said, if he loses to Nog, then I agree he should retire.
He hasn't won a fight since 2006, hasn't won against anyone not named Ken Shamrock since Forrest Griffin, also in 2006. If he loses again, I say hang up the gloves, because you can't hang with the current talent.
Sure, you can say that he's fighting the best, but what do you want him to do? Stick around and keep fighting those who are outside the top 20 in the division? If he's going to do that he might as well go to a lower league like Strikeforce or Bellator. With more and more talent rushing the ranks of the UFC, space and money is of high value. Let's not waste it. I'd hate to see Ortiz stick around longer than needed and possibly headline or co-main a future card vs. some washed up boxing legend.
As for his "razor" thin decisions, a loss is a loss. He can't manage to make that extra push to win, and it's possible that will keep happening. My friend always argues with me about whose more washed up, Ortiz or Liddell. He says Liddell, because Liddell is always getting knocked out, but I think an arguement can be made for Ortiz as well. Sure, Ortiz has the chin to hang in the game, but he doesn't have the skills, while Liddell has the skills, but no longer has the chin. See what I'm saying? Both should be retired for different reasons.
Now for the excuses, I can't stand them. Yeah, injuries sometimes occur and they can take you out of the game, but everyone has them. If the injuries are as bad as Ortiz says they are, then he needs to take a step back from the sport and think about his health. If he is healthy enough to fight, then he needs to shut up everyone time he loses. I remember back when he fought Forrest, and during the introductions he was glaring at Forrest from across the cage and jumping up and down, afterwards he went on to say that his back was hurting him so bad before and during the fight, that he almost couldn't stand. Really Tito? Then why you acting like a gorilla and jumping around? It just doesn't make since to me. There's also other excuses such as the "cracked" skull after the Griffin fight. I remember all the smack he talked leading up to the fight and how he was so happy to finally be "100%" healthy, but during his interview after the fight he mentioned he should have never fought with a cracked skull.
I'm just tired of Ortiz. I thought Hamill was the one to finally shut him up, and I was wrong.