 As the 1937 season began , Feller appeared on the cover of the April 19 , 1937 issue of Time magazine . In his first appearance of the season on April 24 , Feller suffered an injury to his elbow while throwing a curveball . He spent April and May healing the arm , and in May graduated from high school ; the ceremony aired nationally on NBC Radio . In mid @-@ May , the Indians considered ending Feller 's season early . " We 're not taking any chances on that arm and we 're not going to allow him to pitch again until the last trace of soreness has disappeared " , said Slapnicka . On May 18 Feller appeared in his first game since April 24 but did not record an out . He did not pitch again until June 22 , when he recorded two innings , then returned to normal pitching duties on July 4 . 
