Mason L. "Red" Cashion is a former American football official. He started officiating in 1952 while attending Texas A&M University, and then worked for various high school and college football conferences, most notably the Southwest Conference. From 1972 to 1996, he officiated in the National Football League (NFL), and was the referee in Super Bowl XX and Super Bowl XXX. Cashion began his career as a line judge in 1972 following the death of referee Jack Vest, which in turn created an opening at line judge when Chuck Heberling was promoted to referee to replace Vest. Cashion was promoted to referee in 1976 upon the retirement of long-time referee Norm Schachter and the addition of Seattle and Tampa Bay. He wore uniform number 43 for most of his career. During the 1979-1981 seasons, when officials were numbered separately by positions instead of having one number assigned to each official, he wore number 8.
Cashion is known by NFL players, coaches, and fans for his signature first down call in which he would enthusiastically drawl "First dowwwwwn!" out to the crowd. In a 1997 interview with The Sporting News, he said, "I don't know of any time that started it or stopped it. It was just something that sort of evolved and been there ever since". Cashion's promotion to referee came just one season after the NFL began equipping referees with wireless microphones to explain penalty calls and complex rulings to fans in the stadium, members of the media, and the television audience at home.
- "Last call for … 'first dowwwnnn!' - football referee Red Cashion" by Dennis Dillon, The Sporting News, January 6, 1997.