Posted By:
Joe D.just googling indoor baseball and.....
An "off-season" experiment known as "The National Professional Indoor Baseball League" debuted in November to poor reviews. Headed by president Tris Speaker, the league boasted ten clubs, one in each Major League city except Washington. Unfortunately, the novel concept of playing baseball indoors during the winter months failed miserably at the ticket gates and the league was disbanded within a month.
http://www.baseball-almanac.com/yearly/yr1939n.shtml
and
http://www.time.com/time/magazine/article/0,9171,762905,00.html