"Kasper said he contacted McCarthy and Kenney on Monday to lay out “this crazy idea.”
“Len sent me a text and said, do you have the time to talk,” Kenney said. “We talk a lot so I didn’t really expect anything significant. But when the first words out of his mouth were, ‘Are you sitting down?’ I immediately went to his health. He’s got something significant going on with his family. So I was relieved when all he said was, ‘Hey, I think I want to go chase my dream.’”
I wanted to paint the picture of the great game of baseball on the radio like he did for me growing up,” Kasper said. “I want to call postseason games. I want to be behind the microphone to call a World Series."
https://theathletic.com/2239770/2020/12/04/len-kasper-cubs-white-sox/
Clearly there's a pretty big one at this stage of his career. There aren't going to be many sports broadcasters in the world who would prefer the White Sox radio gig to Cubs PbP on TV.