Holding a Transmitter in One Hand, the Player Describes the Game as He Plays, 1939

A PLAY-BY-PLAY account of a basketball game, broadcast by one of the actual players during the contest, went on the air at Cleveland, Ohio in 1939. 

For the radio stunt, the player-announcer carried a short-wave transmitter that required no trailing wires, and the central radio studio picked up and rebroadcast his exciting description of his own plays and those of his team mates and opponents. The picture shows him in action.