MLB © 1969, 15/16" Litho button, Ron Santo Chicago Cubs.  

Ronald Edward Santo was an American Major League Baseball third baseman who played for the Chicago Cubs from 1960 through 1973 and the Chicago White Sox in 1974. In 1990, Santo became a member of the Cubs broadcasting team providing commentary for Cubs games on WGN radio and remained at that position until his death in 2010.

The pinback is used, w/ a flaw on his face.  Thanks for looking.    xxxx-calprk-20