This was the final season before the 1967 NHL Expansion.

Knox's bid was not among the six chosen to take part in the 1967 NHL expansion.

The Seals came into existence in the 1967 NHL expansion.

Following the 1967 win, the Hornets were closed for good, victims of NHL expansion.

After 1967, the rivalry cooled slightly due to NHL expansion and realignment.

These are players selected in the 1979 NHL Expansion Draft.

The Seals were one of six teams added to the league as part of the 1967 NHL expansion.

These players were "priority selections" in the 1979 NHL Expansion Draft.

Speculation as to NHL expansion to Europe took place as far back as the 1960s.

Denver and Seattle were to have been granted franchises in an aborted 1976 NHL expansion.