On This Day in History: Ryne Sandberg Announces His Return to the Chicago Cubs - Sports Illustrated Inside The Cubs
Chicago Cubs News: Ryne Sandberg will get a statue at Wrigley Field
Sammy Sosa, Tom Ricketts and the Cubs - Bleed Cubbie Blue
Cubs to retire Jenkins and Maddux number 31
chicago-cubs-retired-numbers – Scoreboard Charities
Discussions Moving Forward on Cubs Retiring Lee Smith's Number - Bleacher Nation
What does 'Sammy Sosa being back' mean to you? - Bleed Cubbie Blue
Cubs next retired number prediction
52 Chicago Cubs Retired Numbers Stock Photos, High-Res Pictures, and Images - Getty Images
An Exhaustive List of the One-Off Team-Issued Commemorative Baseball Cards of Which the Author is Aware – SABR's Baseball Cards Research Committee