Frank Sinkovitz

Frank Bernard Sinkovitz (May 20, 1923 – August 6, 1989) was an American football center and linebacker who played six seasons in the National Football League (NFL). He then worked as an umpire for 26 seasons (1958–83), wearing uniform number 20, which was later worn by Larry Nemmers and Barry Anderson. He officiated Super Bowl XV, and also worked the final five seasons of his career on the crew headed by referee Jerry Seeman, who later served as NFL Vice President of Officiating from 1991-2001. He was born in Steelton, Pennsylvania and died in Baltimore, Maryland.