Hard to tell anything conclusive from a pic on the net, but what it looks like to me are little "dents" that got smoothed over from the lifter sliding over it. Could be pits too I suppose.
If it's pitting, that's usually from high spring loads and a small nose radius on the cam.

It just seems to me like there was more metal in the oil than what I'd expect from just that.
Unless all the lobes are like that, with similar wear on the lifters.

But it is what it is........if that's all you find, then obviously thats where it came from.

It might just be the lighting or something, but the edge of the lobe on the other side of the rod looks worse to me.

What do I think?
Well.....how about putting a mild roller in it?

I know that won't happen.......just throwing it out there