Which manufacturers are included in Basic sets?

MCMLVTopps

I know Topps, Fleer and Donruss are in Basic sets, but is O-Pee-Chee excluded? If so, why?

epatmythes

Cards for the basic baseball player sets are as follows: BOWMAN, DONRUSS, FINEST, FLAIR/FLAIR SHOWCASE, FLEER/FLEER TRADITION, LEAF, PINNACLE, SCORE, SELECT, SP/SP AUTHENTIC, STADIUM CLUB, STUDIO, TOPPS, ULTRA, UPPER DECK. Pre-war vintage sets may also include issues from CRACKER JACK, GOUDEY, PLAY BALL, SPORTING LIFE & NEWS, T202, T205, T206, and US CARAMEL.

Cards for the basic football player sets are as follows: BOWMAN, BOWMAN CHROME, DONRUSS, FINEST, FLAIR/FLAIR SHOWCASE, FLEER/FLEER TRADITION, LEAF (1948-49), PINNACLE, PHILADELPHIA (1964-67), PRO SET, SCORE, SELECT, SP/SP AUTHENTIC, SPX, STADIUM CLUB, TOPPS, TOPPS CHROME, ULTRA, and UPPER DECK.

Cards for the basic basketball player sets are as follows: BOWMAN, FINEST, FLEER/FLEER TRADIITION, HOOPS, SKYBOX, SP/SP AUTHENTIC, STADIUM CLUB, TOPPS, ULTRA, and UPPER DECK.

Cards for the basic hockey player sets are as follows: BOWMAN, DONRUSS, FLEER/FLEER TRADIITION, LEAF, OPC, OPC PREMIER, PARKHURST, PINNACLE, PRO SET, SCORE, SP/SP AUTHENTIC, STADIUM CLUB, TOPPS, and UPPER DECK.

ThoseBackPages

O-Pee-Chee Baseball has long been under appreciated in this hobby of ours