Ran across this while researching a marathon … everything you need to know about when (and when not) to wear your event shirt.
Excerpt … a completely irrational point of etiquette that I also subscribe to … it may have been an unwritten rule only before now :
"Never wear a race event shirt for the (same) race you are about to do. Only rookies do this. It displays a total lack of integrity and might put the bad-heebee-jeebee-mojo on you for the race. Wearing a T-shirt of the race, while currently running said race, is discouraged. It’s like being at work and constantly announcing "I’m at work". Besides, you wont have the correct post-race shirt then…unless you like to wear sweaty, pitted-out clothes on a regular basis. If you do, then go back to the swamp, Gomer."