2537 is known locally for our "bowling" shirts. It's a big part of our identity. We don't put any sponsor information on our shirts (except for a NASA patch the first 2 years) so that isn't a factor for us. This is our 5th year and our shirts have never changed. It's also good for the families financially because students usually wear the shirt for more than one year.
But another thing is that we don't have any students really interested in design. If you do it would be a fun project for them.