On the obscure side is the 2020 single game "Cal Ripken 25th Anniversary of the Streak" patch. These were worn by the Orioles for a single game on September 6, 2020 in front of an empty house due to COVID. I have never seen one for sale. Exact reproduction.
More here: https://www.facebook.com/photo/?fbid=814439460707440&set=a.461926372625419&__cft__[0]=AZVwLP0LxCXFZ6SbWGqoWZ80pM7JfOyQOKW2VgeAcsR3QxN6Q7FQ3qr8UsMbYXHkiE0CJwuIi2k_K9m7lTWiFRkQnjZvdZxmKVS3m9-P9jbhqy9FRjdgJxp7t8pDRJJQQ3OoWs3bopgm79-pN9zF7rupSXx3L_TOPZcijD5K5S7DwmZivsOHFzyfhbHMu92Q8X8&__tn__=%2CO%2CP-R