Ravens, not in HD?

Having recently obtained the HD service from Adelphia to go with our HDTV, I was excited to watch my first Baltimore Ravens football game in wide screen HD format. For some reason, the game wasn’t broadcast in HD, at least channel 9 wasn’t broadcasting it in HD. When the game was over and they switched to the New England at Denver game, suddenly, it was in HD. I don’t know what was wrong, but I was sure disappointed that I wasn’t able to see the Raven’s win in high definition.