Brick kills a rival reporter by throwing a trident in a scene lifted from the first gladiator fight in Spartacus (1960).
Ron Burgundy's dog is named Baxter. A tribute perhaps to the character made famous by Ted Knight on the hit 1970's sitcom The Mary Tyler Moore Show in which Knight plays a pompous, dimwitted TV news anchorman named Ted Baxter.
In the brawl, the two horsemen with the net between them come after Brian and drag him. This shot (and the accompanying music) comes straight from the Planet of the Apes, the original release.