I just looked at some of the pics from the Bowling Green event on the PDGA site. It says this is one of the oldest events in PDGA history. Claimed to be the Daytona 500 of Disc Golf. I was a little confused about some of the Pictures. From my interpretation of the rule book Atier events require shirts with a collar, or cool-dri type shirts. Like Nike, Huk lab, asics, and Under Armor produces. Its nice to see in the biggest oldest event that the TD's and Players didn't have enough respect for the game to follow one of the easiest rules in the book, but that's just my take.