You would think that Denver should be a haven for punters. Playing half of your games at roughly one mile above sea level, should make it easier to do you job. Generally you should be able to get more distance on your punts at elevation than at sea level.
Unfortunately for the Denver Broncos, this does not appear to be the case. Bronco punters have fared poorly over the past decade both in Denver and on the road while opposing punters seem to thrive at elevation. Oddly enough, former Bronco punters seem to excel after they leave the Broncos.