Christian Matthew Michalak (born January 4, 1971) is an American former Major League Baseball (MLB) left-handed pitcher who played for the Arizona Diamondbacks, Toronto Blue Jays, Texas Rangers, and Cincinnati Reds between 1998 and 2006, and a current MiLB coach.

His most productive season came in 2001, when he tossed 136.2 innings while splitting time for the Toronto Blue Jays and Texas Rangers.

On June 14, 2008, Michalak signed a minor league contract with the Florida Marlins and was assigned to their Triple-A affiliate, the Albuquerque Isotopes.

After his release from the Marlins organization, he signed with the Oakland Athletics and assigned to their Double-A affiliate, the Midland RockHounds, on August 2, 2008.

On April 26, 2009, Michalak signed a minor league deal with the Toronto Blue Jays.