Coomer, 47, spent nine years in the major leagues including the 2001 season with the Cubs. He’s a native of the Chicago area and has most recently been serving as an in-studio analyst for the Minnesota Twins.
“What a great homecoming for Ron,” Crane Kenney, president of business operations for the Cubs, said in a statement. “I enjoyed getting to know Ron during the process and am a fan of his work in the Twin Cities. His knowledge of the game is vast and he will be a great complement to Pat (Hughes) in the WGN booth.”
Coomer replaces Keith Moreland, who resigned after last season.