This is a Throwback 47brand MLB hat. This is an adjustable cap with a mesh back. This low crown Cap is meant to mean worn with a curved or normal brim. Team colors consist of the brim and the back mesh. This retro look has the main MLB Team logo on the from middle with details about the mascot across the top and the year the team was established around the logo. It’s a great looking hat. You can find more info on 47Brand Hats here.
More info on history of Forty Seven Brand Hats Here: