Broken rocker arms two weekends in a row

I'm curious if you looked at the shafts or the actual shaft roller bearings and the actual surfaces of the outer bearing race, and the shaft.
If there was brinelling on either surface, that might cause vibration or stress on the rocker.
Can you crack one of the damaged bearings apart to look at the surfaces.
I'm thinking that you just may need to replace the bearings, not the rocker, (shrug) ?