opening round shutouts (answered)

[Dr. Duran Duran]

In the Super Bowl era, two opening round playoff shutouts have happened in the same season just once. What season did that happen and what were the scores of those two games?

[ravage]

1970

Dallas over Detroit 5-0

Baltimore over Cincinnati 17-0<br><br><span class=gensmall>Accepted as answer by Dr. Duran Duran on Mon Feb 28, 2005 1:02 am EST.</span>

[Dr. Duran Duran]

Nice one, ravage. I wonder if 5-0 is the lowest combined score by two playoff teams?