Steven Cyril DeLong (July 3, 1943 – August 18, 2010) was an American professional football defensive lineman who played in the American Football League (AFL) and National Football League (NFL). He was a first round draft selection in both the AFL and NFL drafts in 1965. He played collegiately for the University of Tennessee, and professionally for the San Diego Chargers and Chicago Bears. In 1969 with San Diego, he set a team record with 17 sacks, a mark which stood until Gary Johnson had 17 1/2 in 1980. He was traded from the Chargers to the Bears on July 26, 1972, for a fourth-round selection in the 1973 NFL draft (84th overall–Jim Thaxton). DeLong was inducted into the Virginia Sports Hall of Fame in 2000. He was the father of professional football player Keith DeLong, who also played for the University of Tennessee.