LOOK: Every last undefeated NFL team since the 17-0 Miami Dolphins
The Pittsburgh Steelers lost to Washington in Week 13. Here is a list of every last undefeated team from every season since the 1972 Miami Dolphins.
Sports blog information from USA TODAY.
The Pittsburgh Steelers lost to Washington in Week 13. Here is a list of every last undefeated team from every season since the 1972 Miami Dolphins.