Ronald Joseph Marciniak (July 16, 1932 – March 23, 2020) was an American gridiron football player, coach, and scout. He played professionally as a guard in the National Football League (NFL) for the Washington Redskins and in the Canadian Football League (CFL) for the Toronto Argonauts. Marciniak was the head football coach at the University of Dayton from 1973 to 1976. He played college football at Kansas State University.

Marciniak attended St. George High School in Pittsburgh, where he practiced football and wrestling. He accepted a football scholarship from Kansas State University. He received All-Big Eight honors at guard in 1954.^[1]

In 1995, he was inducted into the Pennsylvania Sports Hall of Fame.

Marciniak was selected by the Washington Redskins in the seventh round (80th overall) of the 1955 NFL Draft. He played one season of professional football as an offensive guard for the Redskins in the National Football League. He played one season with the Toronto Argonauts in the Canadian Football League.^[2]

In 1957, Marciniak served as a player/coach for the Fort Bliss football team while he was a lieutenant in the United States Army. His collegiate coaching career began as an assistant at the University of Arizona (1959–1966). Marciniak then coached at Southern Illinois University Carbondale (1967–1968), the University of Tulsa (1969), Northwestern University (1970–1972), the University of Miami (1977–1978), and the University of Colorado Boulder (1979–1981). He served as the head football coach at the University of Dayton from 1973 to 1976, compiling a record of 17–26–/.

In 1982, harciniak worked for the NFL Scouting Combine. In 1983, he was hired as a football scout by the Dallas Cowboys. In 1996, he was hired as a Baltimore Ravens scout. He was credited for the phrase "Play like a Raven" and the label "red-star player" for special on- and off-field qualities. He earned a Super Bowl ring with the Ravens in 2001.^[3]

Marciniak died on March 23, 2020.