Len Kasper, the longtime TV play-by-play broadcaster for the Chicago Cubs, is joining the radio booth of the crosstown White Sox.

Kasper, who spent 16 seasons on the North Side, will call games alongside former major leaguer Darrin Jackson. He replaces Andy Masur, who took over after longtime announcer Ed Farmer died in April. Kasper also will work 20 to 25 games as a member of the TV broadcast team.

A Michigan native, Kasper cited the childhood influence of the late Ernie Harwell in making the move, as well as a desire to call a World Series.

Kasper had an up-close view in 2016 as the Cubs marched toward their first World Series championship since 1908. They’ve made the playoffs five of the past six years, but haven’t won a postseason series since 2017. The Cubs are also in transition, with Theo Epstein recently stepping down as president of baseball operations and general manager Jed Hoyer promoted to replace him.

Kasper previously called games for the Florida Marlins (2002-2004) and Milwaukee Brewers (1999-2001).