I began my game worn jersey collection over 40 years ago, but in 2003, I began compiling my knowledge into an indispensable reference book, covering 51 years (1970-2020) of on-field MLB uniform history. Almost two decades later, the “Game Worn Guide to MLB Jerseys” is in its ninth edition, with 4300+ e-pages of detailed information on every MLB team.

For more info check out the Game Worn Guide site