Plager played 645 games in 11 seasons for the Blues from 1967-78. That included being swept 4-0 in the Stanley Cup Final each of their first three seasons (also Montreal Canadiens in 1968 and 1969).
Melissa Briggs said it was a pleasure to see her father soak in the experience of St. Louis' first Stanley Cup championship.
"I honestly don't have words for it," she said. "I'm just so thankful that he's alive to do this, to see this and to celebrate this. And think about it, he's obviously been there for 52 years and he's the only person throughout the entire organization that's talked to every single player. He's the linchpin from Day One to all the way now. I'm just so grateful he's here to see this moment."
Plager said winning the Cup has been very enjoyable for those who were involved with the original Blues.
"When it happened, you looked up (to the skies) at Barclay," Plager said. "It was Barclay, Noel, Jimmy Roberts, Dan Kelly, who announced our games, the Solomons owned us. Those are the people that got the chance like me but didn't win it. It's just been great. I didn't invite everybody, but I invited the kids, their parents tonight. You look around, you see the smiles, how everybody is taking this all in. It's been great.
"For me, this is very special, but sitting here and looking at the kids and thinking, 'This is the toughest trophy to win.' You talk to some of the players and tell them to enjoy it now because you never know when this will happen again."