Dave Zinkoff (May 15, 1910 – December 25, 1985) was a sports public address announcer, memorable for his inimitable and colorful delivery. He worked for the Philadelphia Phillies at Shibe Park in the 1940s, the Philadelphia Warriors, the Philadelphia 76ers, as well as various colleges and boxing and wrestling matches held at the Philadelphia Convention Hall.

Zinkoff worked Wilt Chamberlain's 100-point game in 1962. He was probably most famous for his introduction of long time 76ers star Julius Erving, which went something like "From! The University Of Mazzachushetts, number six, Captain of the Philadelphia 76ers Julius... The Doctor... Errrrrrrrrrving!!" When Steve Mix scored, Zinkoff would say, "Mix makes!" the basket. When Wilt will dunk, he would comment, "Dipper Dunk" and Mel Counts, "That counts".

On March 25, 1986, exactly three months after his death, his microphone was retired by the 76ers.

Julius Winfield Erving II (born February 22, 1950), commonly known by the nickname Dr. J, is a retired American basketball player who helped launch a modern style of play that emphasizes leaping and play above the rim. Erving helped legitimize the American Basketball Association (ABA). He was the best known player in the ABA when the ABA-NBA merger joined it with the National Basketball Association (NBA) after the 1976 season.

Erving won three championships, four Most Valuable Player Awards, and three scoring titles while playing with the ABA's Virginia Squires and New York Nets, and the NBA's Philadelphia 76ers. He is the fifth-highest scorer in professional basketball history, with 30,026 points (NBA and ABA combined). He was well known for slam dunking from the free throw line in Slam Dunk Contests and was the only player to have been voted Most Valuable Player in both the ABA and the NBA.

Erving was named to the NBA's 50th Anniversary All-Time team and in 1993 was inducted into the Basketball Hall of Fame. In 2004, he was inducted into the Nassau County Sports Hall of Fame. Many consider him among the most spectacular basketballers ever, and one of the best dunkers of all time. While players such as Connie Hawkins, "Jumping" Johnny Green, Elgin Baylor, and Gus Johnson were performing spectacular dunks before Erving's time, "Dr. J" is usually the one most people credit with bringing the practice into the mainstream. His signature dunk was the "slam" dunk, since incorporated into the vernacular and basic skill set of the game, in the same manner as the "cross-over" dribble and the "no look" pass.