Tonight could be the night the Cleveland Cavaliers reach their third consecutive NBA Finals.
And in the craze to "Defend the land" comes the wave of wanting to commemorate the moment and lots of folks do that with - T-shirts!
The team issues some collectible shirts at games but last year, fans bought tees at record numbers even now, you'll sometimes see one that's a design you'd missed.
And this year will be no different.
Ideastream's Tim Dubravetz looks at the volatile business of making and selling commemorative tee's.