McCarthy struggled to control his emotions at the moving testimonial held for Lou Gehrig at Yankee Stadium on July 4, 1939. After describing Gehrig as "the finest example of a ballplayer, sportsman, and citizen that baseball has ever known", McCarthy could stand it no longer. Turning tearfully to Gehrig, he said, "Lou, what else can I say except that it was a sad day in the life of everybody who knew you when you [...] told me you were quitting as a ballplayer because you felt yourself a hindrance to the team. My God, man, you were never that."