Buck Showalter served as manager of the Yankees, Diamondbacks, Rangers, Orioles and Mets. He has earned a reputation for building baseball teams into postseason contenders in short periods of time. In 22 seasons, he has reached the postseason six times. A three-time American League (AL) and one-time National League (NL) Manager of the Year, he is the third manager to win four Manager of the Year awards, the seventh to win the award in both the American and National Leagues, and the only one to win the award with four different teams and in four different decades. Buck Showalter has hand autographed this Official Rawlings Major League Baseball (Selig). Pristine full bold blue sweet spot signature. Certificate of Authenticity from Athlon Sports Collectibles.