The Redskins didn't play in the 1972 superbowl. Dallas beat Miami. Washington lost to Miami in the 1973 superbowl
Dallas Cowboys beat the Miami Dolphins on January 16, 1972 to win Super Bowl VI
The Washington Redskins beat the Miami Dolphins in Super Bowl XVII.
which NFL team beat the Miami Dolphins in the 1999 playoff game
Yes, week 1 of the 2014 season the Miami Dolphins beat the New England Patriots 33-20
In 2019, the Dolphins beat the Jets, the Colts, the Eagles, the Bengals, and the Patriots.
The Baltimore Ravens, in overtime.
That was Super Bowl VI played January 16, 1972. The Cowboys defeated the Dolphins 24-3.