Charlton Atlee Hammaker (born January 24, 1958) is a former Major League Baseball left-handed pitcher who played the majority of his career for the San Francisco Giants, from 1982 to 1990. He also played for the Kansas City Royals, San Diego Padres, and Chicago White Sox. During his twelve-year career, he won 59 games, lost 67 games and netted five saves.
Hammaker was born in Carmel, California, on January 24, 1958, the son of Miyake and Charles Hammaker. A middle child; he has one older brother, Aldine and one younger sister, Charlene. He is half German and half Japanese. Hammaker grew up living in many different locations due to his father's career in the United States Army, and attended Mount Vernon High School in Fairfax County, Virginia, where he played basketball, football, and baseball. After suffering a knee injury in football his sophomore year, he began focusing on basketball.