Sandberg's the only comparable in being a player who played in the era of the Cubs retiring #s, and actually being worthy of having it retired. His #23 was never handed out once he retired. Sosa's was handed out soon after he left. Agreed whole-heartedly on Hartnett, who is in the running for best Cub of all time. He deserves something beyond his name listed with 100 other just good Cubs.