Keith collects movie posters.
In 2008, Keith appeared in a commercial for a Long Island coin store.
In 2007, an animated SNY commercial poked fun at Keith's famous moustache. This became a running gag throughout the season.
Keith was nicknamed "Mex" by his teammates, although he is not actually Mexican.
In 2002, fans voted Keith the best all-time first baseman in the history of the New York Mets.
Keith is left handed.
Keith has a strong interest in the American Civil War.
Keith hit .300 in seven seasons throughout his career.
As of 2007, Keith has more assists as a first baseman than any other player in the history of the game.
Keith holds the record for most game winning RBIs in a single season with 24, as well as the most in a career with 129. Because this was only an official statistic from 1980-1988, this record can never be matched.
Keith has appeared with Walt Frazier of the New York Knicks on commercials for "Just For Men" hair products.
Keith has the same agent as Howard Stern.
Keith was a five time All Star, playing on the 1979, 1980, 1984, 1986, and 1987 National League teams.
Keith won the National League Silver Slugger Award in 1980 and 1984.
Keith won a batting title in 1979.
Keith was the first team captain of the New York Mets.
Keith won two World Series in his career. In 1982 with St. Louis, and in 1986 with New York.
Keith was voted into the New York Mets' Team Hall of Fame in 1997.
As of 2007, Keith Hernandez and Willie Stargell are the only two players to share an MVP award in one season (1979).
Keith won the National League Gold Glove Award for a first baseman every year from 1978-1988.