Babe Ruth previously a star pitcher with a 25–4 win–loss record for Detroit in 1907; in later years, he credited Donovan with teaching him much about pitching. Ruth was often called upon to pitch, in one stretch starting (and winning) four games in eight days. On September 5 at Maple Leaf Park in Toronto, Ruth pitched a one-hit 9–0 victory, and hit his first professional home run, his only one as a minor leaguer, off Ellis Johnson. Recalled to Boston after Providence finished the season in first place, he pitched and won a game for the Red Sox against the New York
Babe Ruth Chandler (Judge Landis had died in 1944), proclaimed April 27, 1947, Babe Ruth Day around the major leagues, with the most significant observance to be at Yankee Stadium. A number of teammates and others spoke in honor of Ruth, who briefly addressed the crowd of almost 60,000. Around this time, developments in chemotherapy offered some hope for Ruth. The doctors had not told Ruth that he had cancer because of his family's fear that he might do himself harm. They treated him with teropterin, a folic acid derivative; he may have been the first human subject. Ruth showed dramatic improvement