Personally, i can't stand costas and his holier than though attitude.
http://www.espn.com/espn/otl/story/_/id/25914913/inside-story-how-legendary-nfl-broadcaster-bob-costas-ended-excised-football-nbc-espn
http://www.espn.com/espn/otl/story/_/id/25914913/inside-story-how-legendary-nfl-broadcaster-bob-costas-ended-excised-football-nbc-espn