Chicago Cubs' Derrek Lee swings on a home run off Washington Nationals pitcher John Lannan during the sixth inning of...

CHICAGO - JULY 8: Derrek Lee #25 of the Chicago Cubs bats against the Atlanta Braves during the game on July 8...

CHICAGO - MAY 30: Derrek Lee #25 of the Chicago Cubs runs to cover first base against the Los Angeles Dodgers on...

Derrek Lee and Milton Bradley

CHICAGO - APRIL 19: Derrek Lee #25 of the Chicago Cubs hits his seventh home run of the season in the first...

CHICAGO - APRIL 19: Derrek Lee #25 of the Chicago Cubs hits his seventh home run of the season in the first...

Chicago Cubs' Ryan Theriot signals to teammate Derrek Lee from third base, after Lee hit a double against the St. Louis Cardinals in the fifth...

Chicago Cubs' Derrek Lee, center, is congratulated by teammates Rich Harden, left, and Ryan Theriot after hitting a three-run...

Chicago Cubs' Derrek Lee runs past Atlanta Braves first baseman Casey Kotchman after hitting a two-run home run during...

Chicago Cubs' Derrek Lee follows through on a two-run home run during the first inning of a baseball game...

July 5, 2009; Chicago, IL, USA; Chicago Cubs first baseman Derrek Lee (25) hits a two-run home run during the first inning against the Milwaukee Brewers at...

CHICAGO - MAY 29: Derrek Lee #25 of the Chicago Cubs bats against the Los Angeles Dodgers on May 29, 2009 at...

July 2, 2009; Chicago, IL, USA; Chicago Cubs first baseman Derrek Lee (25) hits a three-run home run during the first inning against the Milwaukee Brewers at...

Chicago Cubs' Derrek Lee watches his grand slam during the fifth inning of a baseball game against the Milwaukee Brewers...

Chicago Cubs' Jake Fox, right, is congratulated by teammate Derrek Lee after hitting a two-run home run against the Chicago White Sox in the fourth inning...