I think it was Bo Jackson but surely there was somebody before him who played both sports professionally. I suggest you use Google to search these relatively easy questions--it would probably be quicker.
first to play
Jackie Robinson
rosa parks
Mr.Robinson
1947. Jackie Robinson was the first African American to play major league baseball
There is no height requirments to play major league baseball.
Being the first black man to play Major League Baseball
His first year in Major League Baseball was 1947.
Jackie Robinson.
Babe
the cubs
Being the first black man to play Major League Baseball