Perhaps, more than any other Negro League star, Biz Mackey enjoyed the respect and admiration of his peers, not only for his exemplary skills behind the plate, but also for his constantly uptempo attitude, jovial manner and extraordinary skills as a teacher of the game.
Mackey was ranked by Homestead Grays owner Cumberland Posey as Negro baseball's all-time catching great,. Posey commented that "Mackey was a tremendous hitter, a fierce competitor, althoug slow afoot he is the standout among catchers who have shown their wares in this nation."
Mackey first appeared in the Negro National League in 1922 with the Indianapolis ABCs. This appearance began a twenty-five year carrer as a player and manager. He represented the East in the first East-West All-Star Game.in 1933, and appeared in three additional East-West contests as a representative of the Philadelphia Stars and Washington Elite Giants.
A lifetime .300+ power hitter, Mackey was also responsible for the development of numerous younger players. Roy Campanella's skills behind the plate were ultimately the product of Mackey's instruction. As the manager of the Newark Eagles, Mackey guided the Newark club to a Negro League World Championship in 1946.