Anyone seem marks like this on a camshaft?

mderoy340 , okay i can see the oil separating . but how is the same etching circle get on the bearing surface ? its inside the bore of the cam bearing , that oil pattern should look way different . i've had weld up cams before , but it doesn't look like that . parkerizing on the cam cover it over on the install , i'm sure you could not see it . it could be a manufacturing fit to the blank cam rounds before grinding , maybe ? just spoke with my cam grinder about your issue and he said to show it to a cam grinder or just replace it and the lifers . and the grind will need your cams history as well . its your call .