John Popovich (March 6, 1918 – February 3, 2004) was an American football player and coach.
He played in the National Football League (NFL) from 1944 to 1945, for the Pittsburgh Steelers and "Card-Pitt", a team that was the result of a temporary merger between the Chicago Cardinals and the Steelers.
The merger was result of the manning shortages experienced league-wide due to World War II.
Popovich was signed to "Card-Pitt" midway through the season, after he returned from the Army due to a medical discharge.
Popovich served as the head football coach at Waynesburg College—now known as Waynesburg University—in Waynesburg, Pennsylvania from 1955 to 1958, compiling a record of 12–16–4.