I can definitely understand the reasoning behind a play on Glover at his current price, but a big bet here seems like a stretch, IMO.
Glover is going to be at a massive speed disadvantage against a guy with big power and much better cardio. We also don't know for sure how those knee surgeries and the layoff have effected Santos. It's possible that he won't be the same guy, but we shouldn't assume that's the case.
Also, Manuwa did not take Santos down at all. The fight hit the ground for a split second when Santos briefly attempted a guillotine on a rocked Manuwa and again when Santos slipped throwing a kick. I don't think it's going to be easy for Glover to get this fight to the ground where he needs it when he's at such an athletic disadvantage.
I've seen a few people saying that Santos is priced where he is because of the Jones fight, but he was also on a very good run before that. He had the current 205 champ in Blachowicz looking extremely tentative and beat him rather easily.
EDIT: I should also mention that most of Glover's recent wins have been come from behind victories against significantly inferior competition to Santos.
Much better cardio? Because he went 5 rounds against Jon Jones, in a fight where Jones only attempted one takedown in the first round and fought at a slow pace?
Maybe I'm misremembering the Manuwa fight. I remember Thiago rocking him, and Manuwa shooting for a takedown, getting it easily, but not being able to hold position. I remember for sure though that Anders, who is uh, let's just say not nearly as good as Glover anywhere, was able to take him down 3 times in the first round.
That fight isn't exactly a fight that should make anyone confident about betting in Santos. It just showed how much of a maniac he is.
He rocks him bad, and instead of fighting composed, decides to engage in a fire fight and gets rocked himself.
I can't take anything away from his win over Jan -- that was by far the best performance of his career. He fought incredibly well, and didn't rush a finish.
Santos is an incredibly volatile fighter. He doesn't have the BJJ off of his back that Smith does, and look how badly Glover beat Smith from rounds 2 and up. I think he'll need just 1 takedown to finish Thiago on the ground.
Don't get me wrong, I think Thiago is incredibly dangerous in round 1. But if Glover can get himself in boxing range and on the inside, a lot of the threats that Thiago presents go away. He likes to keep people at kicking range, and I don't think Glover will play into that.
And we can safely assume that Thiago will be the same, or worse than we saw him last. He's not going to come back stronger, at 36, after a 15 month layoff and multiple knee surgeries.
If I was on Santos I'd play the u1.5, because if it goes past that, Santos will tire and Glover will be able to impose his will.