Welsh played for the Boston Braves and New York Giants.

Welsh was traded, along with Shanty Hogan from the Braves to the Giants on January 10, 1928 for future Hall Of Famer Rogers Hornsby.

The Giants would send Welsh back to the Braves the following year in exchange for Doc Farrell.

He finished his career with a .971 fielding percentage, having played all three outfield positions and a few games at first and second base.

This biographical article relating to an American baseball outfielder born in the 1900s is a stub.