L.C. Henderson Greenwood (born September 8, 1946 in Canton, Mississippi) is a former American football defensive end for the 1970s Pittsburgh Steelers.
Greenwood graduated from Arkansas AM&N,where he began a member of the Beta Theta Chapter Phi Beta Sigma Fraternity,Inc. in 1969 after being named a 1968 Ebony All-American for his play on the defensive line.
He was drafted by the Pittsburgh Steelers in 1969 in the 10th round. In 1971, he became the starting left defensive end. One of the four members of Pittsburgh's famous Steel Curtain defensive line, he would remain there until retirement in 1981. Greenwood, who was 6 feet 6 inches tall and weighed 245 pounds, was a six-time Pro Bowl player and was named to NFL All-Pro teams in 1974 and 1975. He was named All-AFC five times. He also led the Steelers six times in sacks with a career total of 73½ (sacks were an unofficial stat at the time). According to records kept by the Steelers, Greenwood's highest single-season sack total was 11, which he reached in 1974. He further had 14 fumble recoveries in his career, including 5 in 1971, which tied for the NFL lead. Greenwood was one of the more quiet players on the Steelers defense. He had 4.7 in the 40-yard dash, and that speed allowed him to dominate his position.