Yes. The Cowboys have swept the home-and-away series with Washington 16 times, most recently during the 2011 season.
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Yes. In Jimmy Johnson's first season as head coach (1989), the Cowboys went 1-15. Their only victory was over the Washington Redskins in Week 9.
There is no record of anyone by that name ever playing for the Cowboys; the 2008 official Dallas Cowboys media guide does not include him on the all-time roster.
THE DALLAS COWBOYS
The Dallas Cowboys
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I don't know what the preseason schedule for the Cowboys was in 1960 but as far as their first ever regular season game, the Cowboys lost to the Pittsburgh Steelers, 35-28, on September 24, 1960.
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There is no record of anyone by that name ever playing for the Cowboys; the 2008 official Dallas Cowboys media guide does not include Don Delavan on the all-time roster.
There is no record of anyone by that name ever playing for the Cowboys; the 2008 official Dallas Cowboys media guide does not include him on the all-time roster.
No one named Harbaugh ever played quarterback for the Dallas Cowboys.