JSA Clete Boyer signed first day cover matted with a photograph. This piece has a nice a blue on white double matting theme. Piece measures 8 x 10 inches. Cletis Leroy "Clete" Boyer (February 9, 1937 – June 4, 2007) was a Major League Baseball player. A third baseman who also played shortstop and second base occasionally, Boyer played for the Kansas City Athletics (1955–57), New York Yankees (1959–66), and Atlanta Braves (1967–71). Boyer also spent 4 seasons in the Central League in Japanese baseball with the Taiyo Whales (now the Yokohama BayStars). In his 16-year career, Boyer hit 162 home runs with 654 runs batted in and a .242 batting average in 1,725 games played.