boston
Cy Young, with 511.
perry
Yankees
San Francisco Giants with 10,184 wins
50 %
The baseball pitcher with the most wins would be Cy Young. He had 511.
national league is the cardinals with 10 w.s. wins and American league is the Yankees with 27 and the most in mlb.
atlanta braves
Andy Pettitte has the most career postseason wins with 18.
Chicago cubs
new york yankees