Arizona Diamondbacks Introduce Zack Greinke

In This Photo: Tony LaRussa, Zack Greinke
Free agent aquisition Zack Greinke of the Arizona Diamondbacks (L) speaks to the media as Chief Baseball Officer Tony La Russa looks on during a press conference at Chase Field on December 11, 2015 in Phoenix, Arizona.
(Dec. 11, 2015 - Source: Ralph Freso/Getty Images North America)