Good news: looks like MLB Shop is selling “Personalized Alternate Alumni Association Cooperstown Jerseys.”
Bad news: not always era appropriate.
Worse news: looks like someone cut and pasted a database. Richard Aguilera? Walter Backman? William Wilson? (Look at the drop down menu in the grey box in the image below).

I mean I guess it’s cool – even if some players never wore this style. And if you ever wanted a Derrel Harrelson #3 jersey this is your chance.
I don’t like that they made Mazzilli a 13. He is the True 16.
Thanks to @flushingmagic for the heads up
Update: I notice David Kingman is on there twice. He was also on the Mets twice. Adds to my cut and paste theory.
