Mysterious Oil Pan Findings

[paulwaul1369]

For my Z71 Tahoe LT V8 5.3 I was replacing the oil pump. And you know that means you have to drop the pan to do this amongst other things like the xfer case, a cross member and the axle shaft. In the oil pan, I found this broken piece of something... some pins, andwhat looks like a lock ring. (All metal) Check out the pics and lemme know if you know what these might be. There is a backstory though. I just did a top end and replaced all the lifters, guides and all gaskets for the exhaust manifold, intake manifold, and valve covers. I'm hoping these were there from a previous job before I bought the damm thing. I did a pretty clean and thorough job. Enough of the blabbing. Here are the pics.

 

[mikez71]

rocker arm needle bearings. I have heard about these falling out..
Since that chunk of what I think is a rocker is in there, I'll bet it's from a previous job.
Have heard of the bearings showing up and everything still running fine...