The Syracuse Nationals selected Greer with the 13th selection in the 1958 NBA draft. Greer played for Syracuse for five seasons, raising his scoring average to 22.8 points a game in 1961. He was selected for the NBA All-Star team that year. In 1963, the Syracuse Nationals moved to Philadelphia to become the Philadelphia 76ers. There, Greer teamed with Wilt Chamberlain on the 1966–67 team that won the NBA championship. In the 76ers' 15 playoff games that season, Greer averaged a team-best 27.7 points. Greer had an unusual but highly effective free throw technique, shooting a jump shot from the charity stripe. He is usually considered the third-best guard of the 1960s, behind Oscar Robertson and fellow West Virginia native Jerry West. Greer played in 10 NBA All-Star Games and was the MVP of the 1968 game when he went 8-for-8 from the field and scored 21 points, a record-breaking 19 in one quarter. He also was chosen to the All-NBA Second Team seven times, and scored 21,586 points during his NBA career. When he retired after the 1972-73 season, he ranked as the all-time leader in games played and was in the top ten in both points scored and field goals made. As of his death, Greer is the franchise record holder for points scored, field goals, field goal attempts, games played, and minutes played.
Greer's hometown has honored his success by holding "Hal Greer Day" in 1966, and by renaming 16th Street, which carries West Virginia Route 10 as the main artery between the campus/downtown area and Interstate 64, as "Hal Greer Boulevard" in 1978. The 76ers retired Greer's uniform number, No. 15, in 1976; he was the first player the 76ers honored in this way. Marshall's men's basketball team retired Greer's No. 16. Marshall University inducted Greer into its Athletics Hall of Fame for his career in basketball and baseball in 1985. In 1982, Greer was inducted into the Naismith Memorial Basketball Hall of Fame along with Slater Martin, Frank Ramsey, Willis Reed, coach Clarence Gaines, and contributor Alva Duer. Greer is recognized as one of the first African-American athletes enshrined in a major sports hall of fame from West Virginia. He was named one of the 50 Greatest Players in NBA History in 1996. The 76ers installed a statue of Greer at their training complex in 2017.
Accolades
Averaged 22 ppg to lead 76ers to NBA Championship
Played in 10 consecutive NBA All-Star Games
NBA All-Star Game MVP
Set record for most points scored in a quarter during an All-Star Game
Seven-time All-NBA Second Team
Scored 21,586 career points, including 50 in one game vs. Boston Celtics
Scored 1,876 points in 92 playoff games and 120 points in 10 All-Star Games
His jerseys were retired by Marshall University and the Philadelphia 76ers
Personal life
Greer and his wife, Mayme, had a son and two daughters. Greer died on April 14, 2018, following a brief illness. The 76ers announced his death on April 16. They honored Greer prior to Game 2 of the 2018 NBA Playoffs vs the Miami Heat. For the remainder of the playoffs, the Sixers wore a black armband on the sleeve of their jersey with a small patch with the number 15.