Great posts guys! I'll STILL stick to my guns and say that Sergio isn't this top P4P fighter...he's ranked, but not that high in my opinion. There's not that much going on in the MW division (though it should be), and Sergio is the top performer in the division, so that gives people the impression that he's a P4P fighter.
I noticed that Macklin and Martinez fought in similar fashion (lunging and reaching), but Macklin got caught up chasing him and got caught coming in on several occasions while failing to move his head when they got on the inside.
I noticed that someone else mentioned how Sergio gets into the this lull or in my words, stand-still moments, around the 6th and 7th round of fights. It's almost like he takes a break for about 3 rounds, and his opponents either tee off on him a bit, or there's nearly any action at all.
Macklin was busy for most of the fight, but he just declined later in the fight. I mean seriously, he could've hit Sergio more than he did, but Im sure getting countered simply lingered in his mind after catching a few notable counter punches.
The knockdown

...seriously, all of those ringside eyes, should have known that their legs got tangled, but again...the shit that they see from ringside baffles me (to say the least). I hate Emmanuel Steward's theory (paraphrasing), "Had a punch not landed, then he wouldn't have gone down". Again, most of the shit that Steward spews, should always be reevaluated...that's only if you have the strength to even give a damn about what he says.
If Sergio faces a guy that's either a busy fighter by nature or executes a busy game plan, then he may be up shit creek and REALLY have to adjust. Examples of busy fighters or busy game plans are: Pacquiao in the second Morales fight and the De La Hoya fight, or even Sergio in the Williams rematch...and got forbid if he runs into a "punch and clinch" fighter...THAT will totally nullify his one punch at a time style and force him to dig deep.
I said that Sergio would REALLY have to adjust against a more complex fighter, because let's face it, he didn't have THAT much trouble adjusting to Macklin. I think the fact that he started as fast as he did, made viewers look for something big to happen sooner than usual, but it didn't.
Im guessing that he went right at Macklin, because he thought Macklin would do the same. Thing is, Macklin probably thought Sergio would start slow, so the quick start may have thrown him off. Point is, both fighters threw each other off.

I dont know what's up with Sergio though...he starts off a bit slow (though accuracy makes up for it), then has those weird middle rounds, just to score a late knockout. The funniest part is, most of the time, his opponents have greater success in the middle rounds, just to succumb to his awkward style of fighting/gameplan at the end.
It's weird, but those knockouts always seem to happen around the same time, and his opponents just have those "I give up" rounds at the end. Maybe it's because of his constant movement, somebody help me here.
Oh yeah, was anybody dizzy from watching Martinez circle the ring all night? Overall, great fight, and great attendance at the event...nearly 4,500 - 5k people?! Good stuff!