The Dallas Cowboys rivalry with the franchise in Washington was, for a long time, the premier rivalry in the NFL, and some would say in all of sports. That rivalry has cooled down as both franchises went through spells of poor football. Much of the heat from that rivalry shifted over the Philadelphia Eagles, as those two teams are in a bitter feud over who is king of the NFC East.
Riding under the radar of those two is the Cowboys rivalry with the New York Giants. These two franchises have a long history between them and have certainly shared some coaches along the way.