Who's Who in Baseball
From BR Bullpen
"Who's Who in Baseball", published once in 1912 and annually since 1916, features the complete minor and major league statistics of all active major league players of the previous season. Who's Who also features a thumbnail photo, vital statistics, and a full transaction history for each player.
The cover traditionally shows a player who won a major award (MVP or Cy Young Award) the previous season. The back cover features the official team photo of the previous season's World Series champion.