Here are some of the people in the sports world celebrating birthdays on July 8:

Harrison Dillard
Age: 89
Profession: Retired U.S. Olympian
Best Known For: A four-time Olympic gold medalist, American Harrison Dillard is the only male ever to win Olympic championships in both sprinting and hurdling events. Dillard won gold in the 100 meters and the 4x100 meter relay at the 1948 Summer Olympics in London, and he also claimed gold in the 110 meter hurdles and 4x100 meter relay in Helsinki in 1952.

John David Crow
Age: 77
Profession: Retired NFL Player
Best Known For: Winner of the Heisman Trophy in 1957, John David Crow was a star halfback at Texas A&M. After being selected by the Chicago Cardinals in the first round of the 1958 NFL Draft, Crow played 11 seasons with the Cardinals and the San Francisco 49ers. He appeared in four Pro Bowls and finished his career with more completed passes than any other non-quarterback in history (33).

Jack Lambert
Age: 60
Profession: Retired NFL Player
Best Known For: A nine-time Pro Bowl selection, Jack Lambert was an intimidating middle linebacker for four Super Bowl-winning Pittsburgh Steelers' teams from 1974 to 1984. He was selected the NFL Defensive Player of the Year in 1976 and named to the NFL 75th Anniversary All-Time Team. Lambert was inducted into the Pro Football Hall of Fame in 1990.

Bob Ctvrtlik
Age: 49
Profession: Retired U.S. Volleyball Player
Best Known For: A member of the U.S. Men's Volleyball Team that won the gold medal at the 1988 Summer Olympics in Seoul, Bob Ctvrtlik was a standout volleyball player. He was also a member of the U.S. team that won the bronze medal at the 1992 Summer Olympics in Barcelona. Ctvrtlik was one of several U.S. team members who shaved their heads to protest officiating decisions during the Barcelona Olympics.

Hakim Warrick
Age: 30
Profession: NBA Player
Best Known For: A key member of the Syracuse University basketball team that won the 2003 NCAA championship, Hakeem Warrick has gone on to an NBA career with the Memphis Grizzlies, Milwaukee Bucks, Chicago Bulls and Phoenix Suns. He averaged 6.4 points and 2.6 rebounds per game for the Suns in 2011-12.