The Arizona Diamondbacks are searching for a pitching coach, and USA Today suggested Dave Duncan, the Cardinals’ former coach and the longest-tenured pitching coach in big-league history, would be “the perfect fit.” A source confirmed that the Diamondbacks have approached Duncan. He took a leave of absence from the Cardinals in 2011 to help his wife battle cancer, and he did not coach in 2012 to be with Jeanine Duncan until her death in June 2013.