The Brooklyn Cyclones gave out a George Costanza, Marine Biologist bobblehead

glory pic.twitter.com/p8R0bQk6AI

— todd bonzalez (@doinkpatrol) August 19, 2023

ebay has it.

There were other Seinfeld-themed items:

Oh you're gonna have to SPRINT to the team store pic.twitter.com/jt5jzNUoel

— Brooklyn Cyclones (@BKCyclones) August 19, 2023

LGM. Let’s Go Moops.

Welcome to Seinfeld Night 2023. pic.twitter.com/GuEosNhRRP

— Brooklyn Cyclones (@BKCyclones) August 19, 2023