Here are some of the people in the sports world celebrating birthdays on July 11:

Leon Spinks

Age: 59

Profession: Retired Boxer

Best Known For: A gold medal boxer in the light heavyweight division during the 1976 Summer Olympics in Montreal, Leon Spinks went on to upset Muhammad Ali in 1978 and win the heavyweight title in just his eighth pro fight. Known for his gap-toothed smile, Spinks lost the title in the rematch to Ali later the same year.

Al MacInnis

Age: 49

Profession: Retired NHL Player

Best Known For: Possessing one of the hardest slap shots in the history of hockey, Al MacInnis played in 13 NHL All-Star Games during his 21-year playing career with the Calgary Flames and St. Louis Blues from 1982 to 2003. A member of the Flames’ team that won the1989 Stanley Cup, MacInnis won the Conn Smythe Trophy as the most valuable player of that year’s playoffs. He was awarded the Norris Trophy in 1999 as the top defenseman in the league while with the Blues. MacInnis was elected to the Hockey Hall of Fame in 2007.

Andre Johnson

Age: 31

Profession: NFL Player

Best Known For: A five-time Pro Bowl selection, Andre Johnson of the Houston Texans is one of the best wide receivers in pro football. Since being selected third-overall by the Texans in the 2003 NFL Draft, Johnson has led the NFL in receiving yards twice (2008 and 2009). While in college at the University of Miami, Johnson was part of the Hurricanes’ national championship-winning team in 2002.

Chris Cooley

Age: 30

Profession: NFL Player

Best Known For: A two-time Pro Bowl tight end, Chris Cooley has been an integral part of the Washington Redskins’ offense since being drafted by the team in 2004. He holds the Redskins’ franchise record for most career receptions by a tight end with 428.

Caroline Wozniacki

Age: 22

Profession: Tennis Player

Best Known For: Though she has yet to win a Grand Slam final, Caroline Wozniacki is a former world no. 1 on the WTA Tour. The Danish-born Wozniacki has won 18 WTA singles titles since turning pro in 2005. Wozniacki plans to launch her own underwear line in 2012. She dates professional golfer Rory McIlroy.