You make one up !!
Keith from NYC wanted some cards of players who there is no known images of in certain uniforms so I made them up using Photoshop...some look better than others
was signed as a free agent by the Chicago Cubs before the 1967 season
was briefly a NY Met before the 1962 season
spent six years in the Yankees farm system before making the Mets in 1962. I had to use a St Petersburg background instead of leaving it as the Polo Grounds.
was traded to the Atlanta Braves in 1966
was sold to the Yankees in 1976 but the transaction was voided and then was traded to the Reds but that trade too was voided
was traded to the Seattle Pilots in the middle of the 1969 season.so the first version in the 1969 Spring Training uniform would have to be redone, hence the second version.