You apparently were not watching the match as carefully as you thought. Hagan (KMC) did a peterson. The reversal was given, but no backpoints were counted because Keller was still sitting up and his back was too high off the ground. When Hagan leaned back into him, Keller fell back trapping his free arm awkwardly underneath him. While he did cry out in pain, you should have noticed the ref put his right arm behind his head (which is the sign for potentially dangerous) and then stop the match. There was never even a one count. The ref stopped the match for a potentially dangerous position and not because of the cry of pain (which negates the said cry baby rule).
At first the ref did not give any back points at all but after the KMC coach complained and the two refs conferred they gave Hagan two points because the backpoints were eminent (as rule 5-9-2 f indicates). I beleive this was a good use of the associate ref and I did not argue the points.
But to "stongly stress once again he might have been pinned" is a stretch. It was a peterson - a fine move but not usually a pinning combination. Now it is conceiveable that he might have switched off to a headlock and gone for a pin, but that is assuming alot.
And to say it would have gone into overtime is to ignore the fact that Hagan has not ridden Keller for longer than a minute in any of the three matches they wrestled. (Keller won all three of them.)
There are cases where wrestlers abuse the cry baby rule to create an advantage or to avoid a pin, but this was not one of them.