Possible Clues:

• 77-Across' org.
• Org. with Hurricanes and Lightning
• Bruins' org.
• Gretzky's grp.
• Vezina Trophy org.
• Rangers' grp.
• Montreal is in it: Abbr.
• Hart Trophy awarder: Abbr.
• Flyers' and Rangers' org.
• Org. with Devils and Predators