1st Negro League star Josh Gibson suffers a nervous breakdown and is admitted to St. Francis hospital for rest and treatment. He will be released in time to go to Hot Springs, Arkansas, to get in shape for the baseball season.
4th A wartime tone for the season is set when Red Ruffing, just months short of his 38th birthday, and minus 4 toes, is drafted into the Army Air Corp.
5th In Chicago, the teams agree to start the season later than usual and prepare to train in areas north of the so-called Eastman-Landis line (named after Joseph Eastman, head of the Department of Transportation, and Judge Landis), an area East of the Mississippi and North of the Ohio and Potomac rivers. The two St. Louis teams are excluded, though they will train in Missouri. Resorts, armories, and university facilities are chosen for training sites. The Dodgers will train at Bear Mountain, NY; Cards, at Cape Girardeau, MO; the Yankees, in Atlantic City. The Red Sox go to Tufts College.
19th The Braves release veterans Paul Waner and Johnny Cooney.
25th The Yankees send Lefty Gomez to the Boston Braves for cash. He will be released without playing a game and will sign with Washington on May 24th.
27th The Cubs pay cash to the Reds to get P Paul Derringer.
29th The Yankees trade 2B Jerry Priddy and minor leaguer Milo Candini to the Washington Senators for righty Bill Zuber and cash. Zuber, classified 4-F in the draft, will not have a winning season in New York, while Candini will go 11–7 this year.