On April 19, 1927, Ty Tyson provided the play-by-play on WWJ for the first radio broadcast of a regular season Detroit Tiger game, an 8-5 win over Cleveland Indians.
Listen to Tyson announcing a game September 20, 1934 NY Yankees Vs Detroit Tigers
Source : Detroit Historical Society Facebook page.
For more information, see “Ty Tyson, the world’s first sports broadcaster”, Detroit News, February 1, 1996.
Ty Tyson wikipedia entry.