September 16, 2014 Louisville Bats activated 1B Mike Costanzo from the 7-day disabled list.

June 11, 2014 Louisville Bats placed 1B Mike Costanzo on the 7-day disabled list.

May 28, 2014 Louisville Bats activated 3B Mike Costanzo from the 7-day disabled list.

May 19, 2014 Louisville Bats placed 3B Mike Costanzo on the 7-day disabled list.

February 27, 2014 3B Mike Costanzo assigned to Cincinnati Reds.

September 1, 2013 3B Mike Costanzo assigned to Louisville Bats from Pensacola Blue Wahoos.

July 12, 2013 Mike Costanzo assigned to Pensacola Blue Wahoos.

July 11, 2013 Cincinnati Reds signed free agent 3B Mike Costanzo to a minor league contract.

July 9, 2013 Syracuse Chiefs released 3B Mike Costanzo.

March 2, 2013 3B Mike Costanzo assigned to Washington Nationals.

January 16, 2013 3B Mike Costanzo assigned to Syracuse Chiefs.

December 21, 2012 Washington Nationals signed free agent 3B Mike Costanzo to a minor league contract.

November 2, 2012 3B Mike Costanzo elected free agency.

August 2, 2012 Cincinnati Reds sent Mike Costanzo outright to Louisville Bats.

August 1, 2012 Cincinnati Reds designated Mike Costanzo for assignment.

June 6, 2012 Cincinnati Reds optioned 3B Mike Costanzo to Louisville Bats.

May 12, 2012 Cincinnati Reds selected the contract of Mike Costanzo from Louisville Bats.

April 17, 2012 Mike Costanzo assigned to Louisville Bats from Pensacola Blue Wahoos.

March 8, 2012 3B Mike Costanzo assigned to Cincinnati Reds.

November 14, 2011 Louisville Bats signed free agent Mike Costanzo.

November 2, 2011 3B Mike Costanzo elected free agency.

August 12, 2011 3B Mike Costanzo assigned to Louisville Bats from Carolina Mudcats.

August 5, 2011 Mike Costanzo assigned to Carolina Mudcats from Louisville Bats.

July 6, 2011 Mike Costanzo assigned to Louisville Bats from Carolina Mudcats.

June 3, 2011 Mike Costanzo roster status changed by Carolina Mudcats.

May 30, 2011 Mike Costanzo roster status changed by Carolina Mudcats.

May 27, 2011 Carolina Mudcats placed 1B Mike Costanzo on the 7-day disabled list.

April 5, 2011 1B Mike Costanzo assigned to Carolina Mudcats from Louisville Bats.

March 12, 2011 3B Mike Costanzo assigned to Cincinnati Reds.

September 1, 2010 Mike Costanzo assigned to Louisville Bats from Carolina Mudcats.

May 15, 2010 Mike Costanzo assigned to Carolina Mudcats from Cincinnati Reds.

May 14, 2010 Cincinnati Reds signed free agent 3B Mike Costanzo to a minor league contract.

April 2, 2010 Bowie Baysox released 3B Mike Costanzo.

September 21, 2009 Bowie Baysox activated 3B Mike Costanzo from the 7-day disabled list.

July 20, 2009 Bowie Baysox placed 3B Mike Costanzo on the 7-day disabled list.