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Colorado's Carlos Gonzalez, left, jokes around with teammate (Credit: AP)

Colorado's Carlos Gonzalez, left, jokes around with teammate Jason Giambi during batting practice before a game against the Pittsburgh Pirates at Coors Field in Denver. (July 28, 2010)

Jason Giambi

Former Yankees first baseman and American League MVP Jason Giambi signed as a free agent with the Colorado Rockies on Jan. 23, 2010.
See Giambi's career stats and bio

Colorado's Jason Giambi in the dugout at Citi
(Credit: Christopher Pasatieri)

Colorado's Jason Giambi in the dugout at Citi Field. (Aug. 10, 2010)

Colorado Rockies first baseman Jason Giambi watches from
(Credit: Christopher Pasatieri)

Colorado Rockies first baseman Jason Giambi watches from the dugout during a game against the Mets at Citi Field. (Aug. 10, 2010)

Colorado's Carlos Gonzalez, left, jokes around with teammate
(Credit: AP)

Colorado's Carlos Gonzalez, left, jokes around with teammate Jason Giambi during batting practice before a game against the Pittsburgh Pirates at Coors Field in Denver. (July 28, 2010)

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Jason Giambi rounds the bases after hitting a
(Credit: Newsday / Paul J. Bereswill)

Jason Giambi rounds the bases after hitting a solo home run against the Yankees in the 2001 ALDS.

The Yankees were eliminated by Jason Giambi's Oakland
(Credit: Newsday / Audrey C. Tiernan)

The Yankees were eliminated by Jason Giambi's Oakland A's in the 2001 ALDS.

Jason Giambi hits a two-run homer against Anaheim
(Credit: Newsday / Audrey C. Tiernan)

Jason Giambi hits a two-run homer against Anaheim in the fourth inning of Game 1 of the 2002 ALDS.

New York Yankees' Jason Giambi, right, greets his
(Credit: AP Photo)

New York Yankees' Jason Giambi, right, greets his former coach Oakland Athletics' manager Ken Macha prior to their game in Oakland, Calif.

Jason Giambi #25 of the New York Yankees
(Credit: Getty Images Photo)

Jason Giambi #25 of the New York Yankees slides head first into home plate scoring a run on a wild pitch in the fourth inning against the Milwaukee Brewers at Miller Park in Milwaukee, Wisconsin.

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JASON GIAMBI, first base/DHGiambi was one of the
(Credit: Newsday / Thomas A. Ferrara)

JASON GIAMBI, first base/DH
Giambi was one of the players named in the Mitchell Report.

Jason Giambi, a current member of the Colorado Rockies, played for the Yankees from 2002-08. He has played 16 MLB seasons with Oakland, the Yankees and Colorado.

Jason Giambi tips his helmet to the crowd
(Credit: Newsday / Paul J. Bereswill)

Jason Giambi tips his helmet to the crowd after he was taken out for a pinch runner in the sixth inning of a game against Baltimore at Yankee Stadium.

Jason Giambi follows through on a two-run home
(Credit: AP Photo)

Jason Giambi follows through on a two-run home run off Cleveland Indians pitcher Jake Westbrook at Yankee Stadium.

Jason Giambi of the Yankees rounds the bases
(Credit: Getty Images Photo)

Jason Giambi of the Yankees rounds the bases after hitting a solo home run against the Texas Rangers at Ameriquest Field in Arlington, Texas.

Jason Giambi connects for a three-run home run
(Credit: AP Photo)

Jason Giambi connects for a three-run home run off of Baltimore Orioles pitcher Rodrigo Lopez.

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Jason Giambi strikes out in the sixth inning
(Credit: Newsday / Paul J. Bereswill)

Jason Giambi strikes out in the sixth inning of Game 3 of the 2005 ALDS.

Jason Giambi watches batting practice at Legends Field.
(Credit: Newsday / Audrey C.Tiernan)

Jason Giambi watches batting practice at Legends Field.

Jason Giambi warms up around the batting cage
(Credit: AP Photo)

Jason Giambi warms up around the batting cage before a spring training game in 2007.

Derek Jeter and Jason Giambi clown around in
(Credit: Newsday / Audrey C. Tiernan)

Derek Jeter and Jason Giambi clown around in the outfield at Legends Field.

Jason Giambi watches his fourth-inning grand slam in
(Credit: AP Photo)

Jason Giambi watches his fourth-inning grand slam in the Yankees' 8-1 victory over Pittsburgh in a spring training game in Tampa, Fla.

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Derek Jeter, left, congratulates Jason Giambi after Giambi
(Credit: AP Photo)

Derek Jeter, left, congratulates Jason Giambi after Giambi hit a fourth-inning grand slam off Pittsburgh's Zach Duke in the Yankees' 8-1 spring training victory over the Pirates.

Jason Giambi crosses home plate after hitting a
(Credit: AP Photo)

Jason Giambi crosses home plate after hitting a solo home run in the fourth inning off of Texas Rangers pitcher Mike Wood.

The Yankees' Jason Giambi watches the flight of
(Credit: Newsday / Paul J. Bereswill)

The Yankees' Jason Giambi watches the flight of his second-inning solo home run. New York defeated Boston, 6-2.

Jason Giambi failed an amphetamines test within the
(Credit: Newsday / J. Conrad Williams Jr.)

Jason Giambi failed an amphetamines test within the last year, the Daily News reported Wednesday.

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