William Nathaniel "Buck" Showalter III (born May 23, 1956) is an American professional baseball manager for the New York Mets of Major League Baseball (MLB). Previously, he served as manager of the New York Yankees (1992–1995), Arizona Diamondbacks (1998–2000), Texas Rangers (2003–2006), and Baltimore Orioles (2010–2018). He also is a former professional Minor League Baseball player and television analyst for ESPN and for the YES Network for Yankees telecasts.