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Chad Michael Qualls (born August 17, 1978, in Lomita, California) is a relief pitcher for the Arizona Diamondbacks.
On December 14, 2007, Qualls was dealt to the Arizona Diamondbacks along with Chris Burke and Juan Gutierrez for Jose Valverde.
Qualls replaced Brandon Lyon as the closer for the Diamondbacks in mid-September 2008 after Lyon struggled in the second half of the season.