Blumberg/Seibert began the 1980–81 season with gold at the 1980 Skate Canada International, ahead of British duo Karen Barber / Nicky Slater. They then outscored Fox/Dalley to win the first of five straight U.S. national titles, at the 1981 U.S. Championships in San Diego, and ranked fourth at the 1981 World Championships in Hartford.