Major League Baseball is experiencing an epidemic of (mostly) guys being dudes. At ballparks all across the country, groups of largely young men are joining in on the “Tarps Off” trend that’s loud, goofy, infectious and new to the baseball world. Joining in on the fun is simple: Go to the section where the party is happening, take off your shirt and start twirling it above your head. After getting it’s start in St. Louis last Friday, it has spread across the league to places like Detroit, Tampa Bay, Philadelphia and Anaheim, California.