Len Kasper

Len Kasper is an American sportscaster. Since 2021, he has been the radio play-by-play announcer for the Chicago White Sox of Major League Baseball, teaming with color analyst Darrin Jackson on ESPN 1000 and the Chicago White Sox Radio Network.

From 2005 to 2020, Kasper worked alongside analysts Bob Brenly and Jim Deshaies on Chicago Cubs telecasts. He also joined the team's radio network for the fifth inning of games that were televised nationally (including playoff games), working with regular radio announcers Pat Hughes and Ron Coomer.

Career Kasper first worked for WTMJ-AM (620) from 1994 to 2002 in Milwaukee as the host of the station's daily sports show, hosted pregame and halftime shows for the Green Bay Packers, and was a co-host on a hot stove league show on the Brewers' radio network. After realizing he would need experience calling baseball games, he started working with Brett Dolan on the weekends in the late 1990s calling several innings at a time for the Beloit Snappers. Kasper received the Harry Caray Sportscaster of the Year Award from the Pitch and Hit Club of Chicago in 2011.

On Friday, December 4, 2020, it was announced that he would be leaving the Chicago Cubs TV broadcasting booth to become the primary radio play-by-play announcer for the Chicago White Sox on WMVP 1000 AM and fill-in TV announcer on NBC Sports Chicago. He was replaced by Jon Sciambi.

Kasper founded and is the bass player for the band Sonic45. Sonic45 is a Chicago-based new wave band who have released two records "Space and Time" in 2021 and "SuperSonic" in 2024.

Personal life Kasper grew up in Michigan. His broadcasting influence was the Detroit Tigers' radio broadcasters, Ernie Harwell and Paul Carey. He graduated from Shepherd High School. He graduated summa cum laude from Marquette University with a degree in public relations in 1993.