The NHL added six new teams in the 1967 expansion .
NHL were the Minnesota North Stars , Pittsburgh Penguins , Philadelphia Flyers , California ( Oakland ) Seals , St. Louis Blues and the Los Angeles Kings .
The NHL added six new teams in the 1967 expansion and they were the Minnesota North Stars , Pittsburgh Penguins , Philadelphia Flyers , California ( Oakland ) Seals , St. Louis Blues and the Los Angeles Kings .