Marty is the one who played Drew Brees in a meaningless game against Denver last year instead of getting Phillips some reps. Brees was injured in that game. Marty hasn't won a single playoff game since 1993 despite having home field advantage 3 times. As a Broncos fan, I'm sorry to see Marty go.
If Spanos truly wanted to fire Schottenheimer, why would he offer an extension after the end of the season, even if it was only a single year?
The answer: he really didn't, at least not right away. AJ Smith, however, has managed to convince Spanos to get rid of Schotty.
I'm guessing San Diego will make a run at Norv Turner or Pete Carroll.
I wouldn't doubt there was pressure at the top, and it involved Smith. Spanos had two options: kick Smith out of the front office or fire Schottenheimer. He opted for the second option.