A lot of teams wear green caps and jerseys and stuff for spring training games around St. Patrick’s Day. I assumed this was hatched as a marketing thing. A way to sell more merch. It may be now, but apparently is started with a bit of a prank by Tug McGraw.
You can read the story in Paul Hagen’s column in the Philadelphia Daily News. But warning: Philly.com continues to run auto-play video on its web pages. Which, given the number of people who surf the sports pages at work, seems like a great way to get readers to avoid your content for fear of, you know, getting in trouble.