10 July 1927, Chicago Daily Tribune, pg. A4:
The well wishers would have the league break up the Yankee combination and distribute the strength among the weak clubs.
18 August 1929, New York Times, pg. S2:
A fellow with a good strong memory might even recall the time when Colonel Rupert was urged to break up the Yankees because they were so strong they would wreck the league by winning continuously. That was almost a year ago.
24 February 1941, New York World-Telegram, pg. 18 (Willard Mullin cartoon):
WHO WAS IT SAID "BREAK UP THE YANKEES"?