More and more, team shirts are going away from quotes or sayings on the back.
But, you can still find them if you look. Here's a slide show of an informal top ten I found at yesterday's running of the Cheyenne Mountain Stampede (ones with something on the back were much more in evidence for the 2A/3A races than the 4A/5A races, but both groups are represented here). And, I added a few of the first thoughts that went through my head as I got a chance to look at the photos.
There's a link at the end of this article if you care to cast a vote for your favorite among the crowd.
#1 - Probably good advice for lots of things beyond cross country.