Monday, November 15, 2010
1936 Ossining Sing Sing Prisoners
The MWL on the cap stands for "Mutual Welfare League". Created by Thomas Mott Osborne, warden of Sing Sing prison in Ossining, New York. He established a system of internal self-rule called the "Mutual Welfare League" within the prison and quickly won enthusiastic support from both guards and prisoners
There is a great chaper in Harold Seymour's The People's Game Volume 3 titled Baseball Breaks into Prison.