Furious George, Neon Yellow Panda Dragons (NYPD), Seattle Sockeye and Revolver are just some of the clubs involved.
Poole has friends from various teams and says that even though they are spread far and wide, the overriding theme of the league is community.
"I love ultimate because of the players, the people that are involved with it -- they're just very inviting, very welcoming," he said. "I think that's the best part of ultimate.
"It's a situation where you can play competitively and then go out for a drink, go out for food afterwards, even though you're playing against those players you can still be friends off the field."
It might only be a small disc weighing just 175 grams but there are many ways to manipulate it around the playing field.
As Poole explains, the two most common throws are backhand and forehand, just like in tennis, and the best players complete pinpoint passes with a simple flick of the wrist.
The more complicated maneuvers include the hammer, an overhead throw that travels far faster than either the forehand or backhand, used to quickly switch play from one side of the field to the other.
Then there's the scoober, a short flick used to loop the disc over a defender, typically no more than 15 or 20 yards.
But despite the variations of throw, Poole's favorite aspect of the game is attempting to catch.
"My favorite thing to do is lay out," he said. "I dive for the disc, leave my feet and catch the disc as it's going to the ground.
"It means that I can't run it out, I need to extend as far as possible to catch the disc. The disc is the most important thing in ultimate.
"You have to maintain possession, so laying out if you have to do it, you've got to do it."
Ultimate now has two pro leagues in the United States and interest is growing, but for now the Chain and their players are doing it purely for the love of the game.
As Poole says with a smile: "I make zero dollars playing ultimate, but I spend way more than that."