Established sports radio broadcasts have provided memorable moments dating back to 1921. Notable early broadcasts included the first baseball broadcast in 1921 and coverage of the 1936 Berlin Olympics. Major sporting events like heavyweight boxing matches and baseball games attracted huge radio audiences and generated well-known catchphrases from announcers. Iconic broadcasts included Lou Gehrig's farewell speech in 1939 and Vin Scully's call of Hank Aaron's record-breaking 715th home run in 1974. Famous announcers helped immortalize these historic sporting moments through their descriptive and engaging radio calls.