Weldy Wilberforce Walker (July 27, 1860 – November 23, 1937), sometimes known as Welday Walker and W. W. Walker, was an American baseball player. In 1884, he became the third African American to play Major League Baseball. His March 1888 open letter to The Sporting Life protesting the racial segregation of baseball has been described as "perhaps the most passionate cry for justice ever voiced by an athlete."