Donald Zackary "Zack" Greinke (born October 21, 1983 in Orlando, Florida) is a Major League Baseball (MLB) pitcher for the Arizona Diamondbacks. While pitching for the Kansas City Royals, he won the 2009 American League Cy Young Award, which is an award that goes to the player that is voted as the best pitcher in the league for that year. Greinke has also pitched for the Milwaukee Brewers, Los Angeles Angels of Anaheim, and the Los Angeles Dodgers.