There is an interesting rumor on profootballtalk.com regarding Rod Marinelli, the Bucs defensive line coach:
"Marinelli is emerging as a leading candidate for the head coaching job in Oakland, eclipsing Chiefs offensive coordinator Al Saunders."
The only reason I would discount this rumor is that Al Davis doesn't hire defensive coaches as head coaches.
However, if Marinelli were to get the job, I would give him the benefit of the doubt. Norv Turner was a proven loser. Marinelli isn't a proven anything.