I Find This Funny

I find it funny when a team has a press conference for a new player and they make him put on a jersey over his dress shirt and tie.
When did that practice start?
I'm not saying its a bad idea. It just looks funny to me. I don't know why.
Try showing up at your office, if you have a job that requires business attire, and wear a baseball jersey over your shirt and tie. I wonder how that would go over.
I bet people would laugh.