PHOENIX - APRIL 29: Relief pitcher Kevin Gregg #63 of the Chicago Cubs pitches against the Arizona Diamondbacks during the game at Chase Field on April 29, 2009 in...

IRVING, TX - NOVEMBER 17: Defensive lineman Richard Dent #95 of the Chicago Bears takes the ball away from quarterback Danny White #11 of the Dallas Cowboys during a game...

Chicago Bears stadium banner

A 50-inch by 90-inch linen Chicago Bears stadium banner, circa 1930s. ($1,000 to $2,000

Norm Van Brocklin College All-Star helmet, uniform

...Norm Van Brocklin in his last game as a collegian, the 1949 College All-Star Game at Chicago's Soldier Field. ($10,000 to $15,000

...14: Paul Pierce #34 of the Boston Celtics stands on the court before the game against the Chicago Bulls on January 14, 2010 at TD Banknorth Garden in Boston, Massachusetts. The Bulls won 96-83...

DETROIT - JANUARY 3: Devin Hester #23 of the Chicago Bears carries the ball during the game against the Detroit Lions on January 3, 2010 at Ford...

Chicago Bears' Richard Dent (95) sacks New England Patriots' Steve Grogan during Super Bowl XX in New Orleans...

CHICAGO - DECEMBER 31: Rocky Wirtz, team president of the Chicago Blackhawks stands near the ice as the Blackhawks...

...Panthers at Candlestick Park. Mandatory Credit: Photo By US PRESSWIRE © Copyright US PRESSWIRE CAPTION: Nov 3, 1991; Chicago, IL, USA; FILE PHOTO; Chicago Bears defensive end (95) Richard Dent during the 1991 season against the...

Apr 28, 2009; Chicago, IL, USA; Seattle Mariners starting pitcher Felix Hernandez smiles after retiring the side in the top of...

...14: Glen Davis #11 of the Boston Celtics handles the ball against Brad Miller #52 of the Chicago Bulls during the game on January 14, 2010 at TD Banknorth Garden in Boston, Massachusetts. The Bulls...

DETROIT - OCTOBER 04: Justin Verlander #35 of the Detroit Tigers pitches against the Chicago White Sox during the game at Comerica Park on October 4, 2009 in Detroit, Michigan. The Tigers...

...from Bridgeport, Conn., shows his colors before the start of Super Bowl XLI football game against the Chicago Bears at Dolphin Stadium in Miami, Sunday, Feb. 4, 2007

DETROIT - OCTOBER 04: Justin Verlander #35 of the Detroit Tigers pitches against the Chicago White Sox during the game at Comerica Park on October 4, 2009 in Detroit, Michigan. The Tigers...

Feb 3, 2010; Chicago, IL, USA; Chicago Blackhawks goalie Cristobal Huet (39) looks for the puck during the third period at...