Yes I did. I just put together an image that shows 2 of those players performing bad, compared to their respective substitute (you have to zoom in a bit ).

I can'T see any relation in age or attributes.

By the way, both are performing weak for at least one complete season.

Click image for larger version.  Name: Unbenannt-1.jpg  Views: 263  Size: 97.4 KB  ID: 18063