[Raptor]

I have to say this, not to put blame directly on anyone, but because it is the straight up truth. I don't know who put the turbo on, but if you noticed it was spinning hard instead of smooth as it should of, it was the installers responsibility to find out why and either return it at that point or correct the problem. If you put a part on that is questionable in the beginning and something happens, should you be all that surprised? Turbos are not supposed to be hard to spin when they are new, if they are, there is a problem.

Now next on the list, why do rod bearings spin? It is usually from oil starvation, followed by overheating on the journal then failure. Oil that is extremely dirty or has no more lubricating qualities left can also add to that possibility. If the motor was new, too tight of bearing clearances can also cause it. So figure out why those situations might be true and you have the reason for your failure. Knock can cause major destruction, but it will not cause a bearing to spin.
Either way, tuning on the street without some decent method of logging is just asking for trouble.