Here are some of the people in the sports world celebrating birthdays on October 9:

Steve Ovett
Age: 57
Profession: Retired Olympian
Best Known For: A gold medalist in the 800 meters at the 1980 Summer Olympics in Moscow, Britain's Steve Ovett set world records for the 1500 meters and the mile run in the early 1980s. Ovett and fellow countryman Sebastian Coe had a spirited rivalry from 1978 through 1990.

Mike Singletary
Age: 54
Profession: Retired NFL Player / Coach
Best Known For: A 10-time Pro Bowl linebacker, Mike Singletary was the centerpiece of the Chicago Bears' defense that helped win Super Bowl XX. He played for the franchise from 1981 to 1992. Singletary was named NFL Defensive Player of the Year in 1985 and 1988. He was inducted into the Pro Football Hall of Fame in 1998. Singletary coached the San Francisco 49ers from 2008 to 2010.

Annika Sorenstam
Age: 42
Profession: Pro Golfer
Best Known For: A winner of 72 LPGA tournaments, including 10 majors, Annika Sorenstam is one of the most successful golfers in history. She won eight Player of the Year awards and earned $22 million — the highest total for a female of all-time. She is the only female golfer to shoot a score of 59 in competition.

Henrik Zetterberg
Age: 32
Profession: Retired NHL Player
Best Known For: An All-Star center, Henrik Zetterberg has played with the Detroit Red Wings since 2002. He won the Conn Smythe Trophy as the Most Valuable Player of the 2008 Stanley Cup Playoffs, won by the Red Wings. He was on the Swedish national team that won the gold medal at the 2006 Winter Olympics in Turin.

Darius Miles
Age: 31
Profession: Former NBA Player
Best Known For: A talented player that never fulfilled his full potential, Darius Miles played for the Los Angeles Clippers, Cleveland Cavaliers, Portland Trail Blazers and Memphis Grizzlies from 2000 to 2009. He was selected by the Clippers with the third-overall pick of the 2000 NBA Draft and named to the NBA All-Rookie Team in 2001. While in Portland, Miles had frequent clashes with head coach Maurice Cheeks. An injured knee prevented Miles from playing in 2006-07 and 2007-08 and ultimately ended his career.