Former Chicago Bears quarterback Jim McMahon looks at a large bear after a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, right, signs autographs for Frank Castagnoli before a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, right, signs autographs for Paul Nowak, left, and Gordon Davis, center before a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, signs autographs after a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, smiles during a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, talks during a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, talks during a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, talks during a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Former Chicago Bears quarterback Jim McMahon, signs autographs after a press conference at the University of St. Francis in Joliet, IL on Thursday, October 18, 2012. | Matt Marton~Sun-Times Media
Jim McMahon was smiling as he discussed his visit to New York last week. That hasn’t always been his expression since he retired from football and began feeling the effects of early onset dementia brought on by at least four concussions and hundreds of vicious …
