The first african american player in major league baseball was

The first African American player in Major League Baseball was Jackie Robinson.

Jackie Robinson (Cairo, January 31, 1919 - Stamford, October 24, 1972) was an American baseball player. He was the first African-American player of Major League Baseball in the modern era. On April 15, 1947, Jackie Robinson broke the "color line" in American baseball, playing for Brooklyn Dodgers.

He is considered the greatest idol in the sport by many baseball fans.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.