Running back Dan Reeves was a player-coach with the Cowboys in Super Bowls V and VI and a Cowboys assistant coach in Super Bowls X and XI. Also, Mike Ditka played tight end for Dallas in Super Bowl VI and served as a Cowboys assistant coach for Super Bowls X, XII and XIII.
There was no player who played in Super Bowls with the Cowboys, Eagles and Bears. There might be a coach or a former player turned coach involved with all six games, but no one fits this criteria as a player. In terms of service, the person who holds the record for playing in the most Super Bowls is former Bills and Broncos defensive lineman Mike Lodish. He played in six games between the two franchises. He played in Super Bowls XXV, XXVI, XXVII & XXVIII in Buffalo and XXXII-XXXIII in Denver. There are two players who have played in five Super Bowls on three different teams. That players are Preston Pearson, Baltimore, III; Pittsburgh, IX; Dallas, X, XII-XIII and Bill Romanowski, San Francisco, XXIII-XXIV; Denver, XXXII-XXXIII; Oakland, XXXVII.
Joe Greene. Greene played in Super Bowls X and XIII against the Cowboys and was a assistant coach in Super Bowl XXX.
The NFC East includes the Dallas Cowboys, New York Giants, Philadelphia Eagles, and the Washing Redskins. The Cowboys have won 5 Super Bowls. The Giants and Redskins have won 3 each. The Eagles have not won a Super bowl yet.
The NFC East Cowboys 8 Giants 4 Redskins 5 Eagles 2
The Dallas Cowboys have lost 3 super bowls.
The Philadelphia Eagles appeared in two Super Bowls, and lost both.
Cowboys because the Chargers never won a Super Bowl . The Cowboys have won 5 super bowls