Here are some of the people in the sports world celebrating birthdays on October 20:

Juan Marichal
Age: 75
Profession: Retired MLB Player
Best Known For: A 10-time All-Star pitcher with a high leg-kick delivery, Juan Marichal played for the San Francisco Giants, Boston Red Sox and Los Angeles Dodgers during his career from 1960 to 1975. A fierce competitor, Marichal once hit Dodgers' catcher John Roseboro in the head with a bat during a brawl. He was inducted into the Baseball Hall of Fame in 1983.

Keith Hernandez
Age: 59
Profession: Retired MLB Player / Broadcaster
Best Known For: A five-time All-Star first baseman with a trademark mustache, Keith Hernandez played for the St. Louis Cardinals, New York Mets and Cleveland Indians during his career from 1974 to 1990. While with the Cardinals in 1979, he won the National League Most Valuable Player Award and the batting title. Hernandez won 11 Gold Glove Awards and two Silver Slugger Awards. He was a member of the Cardinals' team that won the 1982 World Series and the Mets' team that won the championship in 1986. He guest-starred on the television sitcom 'Seinfeld' in the early 1990s.

Scott Hall
Age: 53
Profession: Pro Wrestler
Best Known For: Wrestling since 1985, Scott Hall — also known by his ring name of 'Razor Ramon' — has been a champion wrestler for the World Wrestling Federation and World Championship Wrestling. He was part of the New World Order with Hulk Hogan and Kevin Nash.

Juan Gonzalez
Age: 43
Profession: Retired MLB Player
Best Known For: A three-time All-Star outfielder, Juan Gonzalez played for the Texas Rangers, Detroit Tigers, Cleveland Indians and Kansas City Royals during his career from 1989 to 2005. Gonzalez won the American League Most Valuable Player Award in 1996 and 1998. He won six Silver Slugger Awards as the best offensive player at his position.

Willis McGahee
Age: 31
Profession: NFL Player
Best Known For: Willis McGahee is a running back for the Denver Broncos. A two-time Pro Bowl selection, McGahee has also played with the Buffalo Bills and Baltimore Ravens since being selected in the first round of the 2003 NFL Draft. McGahee played college football at Miami where he was an All-American in 2002. He suffered a debilitating knee injury in a 2003 Fiesta Bowl loss against Ohio State that cost his team the national title.