Well I needed to do an official ‘post-campaign clean-up’ of the Mariner so Evan could borrow it and I came upon this shirt. 

I guess the shirt itseld is not mysterious but the presence of it in the ‘way back’ of my car is.

It’s a size large. I thought maybe it belonged to someone who walked in the St Patrick’s Day parade with us but after asking a few peeps doesn’t seem to be.

Please help solve the mystery.