 He played two seasons in Major League Baseball for the Pittsburgh Pirates, from 1921 until 1922.An Oklahoma native, Yellow Horse, a Native American from the Pawnee tribe, was the first full-blooded American Indian to have played in the Major Leagues.Yellow Horse was born in United States Indian Territory to Clara and Thomas Yellow Horse in the early part of 1898 (one source lists his given name as "Mose", though all other sources give it as "Moses").