The National League finally approves the use of uniform numbers to identify players.

on June 22, 1932 The National League, at a meeting of club presidents, finally approves the use of uniform numbers to identify players. Although some teams in the AL implemented digits on their jerseys on a regular basis in 1929., the Senior Circuit had refused to follow suit, probably as the result of the Cardinals being harassed by opposing players and fans when they wore numerals on their sleeves in 1923.

 
@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90YWdzIiwic2V0dGluZ3MiOnsiYmVmb3JlIjoiTGVhcm4gTW9yZSBhYm91dCB0aGUgdGVhbXMsIHBsYXllcnMsIGJhbGwgcGFya3MgYW5kIGV2ZW50cyB0aGF0IGhhcHBlbmVkIG9uIHRoaXMgZGF0ZSBpbiBoaXN0b3J5IGp1c3QgY2xpY2sgdGhlIHRhZ3MhICAiLCJhZnRlciI6IiIsImxpbmtfdG9fdGVybV9wYWdlIjoib24iLCJzZXBhcmF0b3IiOiIgfCAiLCJjYXRlZ29yeV90eXBlIjoicG9zdF90YWcifX0=@