throughout history. Tom Brady was always a part time starter from college to the Pros until Bledsoe's injuries. Barry Sanders sat the bench behind Thurman Thomas even though people started to realize he was better.
Anybody who has played football can think of 2nd Stringers that were better than 1st teamers. Out of my high school team years ago I can think of 5 guys who should not have been starting and the guy that should have been in front of him.
I remember when I was at BYU the players were telling me that Brady Poppinga was awesome as a part time Freshman and should be getting more time.