According to the back story, Edgar was the first to hatch. Edgar is tall and broad shouldered, representing the "backfield" or the players of the game routinely not staged on the line of scrimmage. This represents the linebacker, defensive back, fullback, quarterback, etc. Edgar is decidedly proud, if not arrogant, and is the leader of the trio.
Allan is particularly shorter and thinner than Edgar and especially Poe, yet much quicker. He represents the receivers and running backs. Allan is a very excitable bird who always has energy to spare.
Poe was the last to hatch. Poe is short and stout representing the linemen of the game. He is a slow, lazy, yet lovable mascot. Poe routinely joins tailgate parties in his never-ending search for the perfect cheeseburger.