Conversation so far:
Where did Joe McGinnity begin as a professional baseball player?
George Pinkney saw McGinnity pitch, and contacted Brooklyn owner Charles Ebbets to recommend he sign McGinnity.
How did Joe McGinnity evolve career-wise ?
Joe McGinnity developed an unorthodox pitching delivery and slow pitching speed.
Where did Joe McGinnity play professional baseball?
Hanlon assigned McGinnity to the Orioles for the 1899 season.

Question: Where else did he play?
Self-contained rewrite: Where else did Joe McGinnity play besides the National League Baltimore Orioles?