Larry Louis Poncino (born February 3, 1957) is a former umpire in Major League Baseball. His Major League umpiring debut came on July 11, 1985, and his last game was on September 30, 2007. He umpired in the 2006 American League Division Series; the National League Championship Series in 1998, 2003, and 2005, and the 1996 MLB All-Star Game. Poncino wore uniform number 13 during his National League stint, then changed to 39 when the NL and AL umpiring staffs merged in 2000.