Once upon a time back in r/lebowski lore there was a poster…I can’t remember his handle but I’m sure it self applied in his parts. That poster was a man of our time and he suggested that the league had a rule that at least one bowler on the team needed to wear a team bowling shirt with a name on it. So Walter, in his infinite wisdom and frugality poured over all of the league bylaws and saw no reason why they could not find cheap bowling shirts at thrift stores and just wear those. Since Donny was the easiest team member to fit in the shirts, he wore the team shirt. When Donny died, the duty fell to The Dude as he wears the infamous Medina Sod shirt at Donny’s what have you…and that about wraps it up