John Donald "Spider" Jorgensen (November 3, 1919 – November 6, 2003) was a third baseman in Major League Baseball who played from 1947 through 1951 for the Brooklyn Dodgers (1947–50) and New York Giants (1950–51). Jorgensen made his MLB debut for the Dodgers on April 15, 1947, the same day teammate Jackie Robinson broke the professional baseball color line. "In all the time he coached us, I never knew Spider played for the Dodgers," Baker said in the 2004 book How To Be Like Jackie Robinson. "I knew he was a terrific coach, but he never once mentioned he was a former player."