Walker studied sign language for several years after meeting Marlee Matlin at
the premiere of the film Walker (1987) at Lincoln Center in New York City.
Began taking college-level math classes while in the sixth grade.
Worked as a bike messenger in Atlanta, Philadelphia & New York City to
pay for college.
His sister is renown Spanish flautist Claudia Walker.
His grandfather, a professional baseball scout, signed baseball legend Tim McCarver to the major leagues.
His father graduated from high school with Elvis.
In 2008, at age 40, rode his mountain bike from San Francisco to Los Angeles in seven days to raise money for the San Francisco Aids Foundation.