Jackie robinson played baseball, not basketball
He was primarily a Second Basemen.
Early on in college Jackie Robinson was a quarterback, and saftey. Before he went into the service Jackie Robinson was a running back for a semi pro team.
Jackie Robinson played all of his 151 games in his rookie season (1947) at first base.
Jackie Robinson was a professional baseball player.
Jackie Robinson played baseball as a kid.
He was a first baseman when they needed him to be. But his official position was second baseman.
Jackie Robinson is the first black player to play in the MLB.
Jackie Robinson played one year in the Negro Leagues, 1945, and he played 47 games at shortstop for the Kansas City Monarchs.