David William Cowens (born October 25, 1948) is an American retired professional basketball player and NBA head coach. At 6'9", he played the center and occasionally the power forward position. He was inducted into the Naismith Memorial Basketball Hall of Fame in 1991. Most recently he served as an assistant coach for the Detroit Pistons, and then as a special assistant to Pistons President of Basketball Operations Joe Dumars, prior to Dumars' regime being replaced by that of Stan Van Gundy.
After starring in high school at Newport Catholic High in his hometown of Newport, Kentucky, Cowens played his collegiate basketball at Florida State University from 1967 to 1970. He scored 1,479 points in 78 games at Florida State, at 19.0 points per game, and ranks among Florida State's top 10 all-time scoring leaders.
He is the all-time Florida State leading rebounder with 1,340 rebounds (17.2 rebounds per game). He holds the team record for best seasonal rebound average (17.5 in the 1968–1969 season). He once grabbed 31 rebounds (second best all-time) against LSU in the 1968–69 season.
He was named The Sporting News All-America second team in 1970. His number now hangs in the rafters of the Donald L. Tucker Center.
Despite some critics who felt Cowens was too small to play center, Cowens was selected as the fourth overall pick by the Boston Celtics during the 1970 NBA draft, largely at the recommendation of former Celtics center Bill Russell. During his rookie year, Cowens averaged 17.0 points per game and 15.0 rebounds per game. He was named to the NBA All-Rookie First Team and shared the NBA's Rookie of the Year honors with Portland's Geoff Petrie. He also led the league in personal fouls that same year.