After a mediocre career as a player and manager, Branch Rickey spent half a century in the front office as baseball’s greatest visionary executive. Heydler was a baseball umpire in the 1890s who later became the president of the National League. Vintage fountain pen signature, “Branch Rickey,” on a light yellow 3.5 x 1.75 album page. In fine condition. Auction LOA Steve Grad/PSA/DNA and R&R COA.