You're right - Musburger was on CBS when first started watching football and for some reason I still associate him with that network.
Anyone remember when the CBS studio crew consisted of Musburger, Irv Cross, Jimmy the Greek and Phyllis George/Jane Kennedy?
I think CBS fired Jimmy the Greek in like 1987.
I remember my dad talking about it, but considering that had to have been the mid 80s or so, I was a bit young :)