Well it depends on which Brandon Randall you are talking about!
As of June 2014, Randall Brenes is 30 years old.
As of the 2014 MLB season, Randall Delgado is 24 years old.
Randall Azofeifa is 26 years old (birthdate: December 30, 1984).
Mark Randall is 21 years old (birthdate: September 28, 1989).
Randall Munroe is 26 years old (birthdate: October 17, 1984).
Randall Bewley is 56 years old (birthdate: July 25, 1955).
Randall Wallace is 62 years old (birthdate: July 28, 1949).
Randall Bentley is 20 years old (birthdate: July 16, 1991).
Randall Gay is 29 years old (birthdate: May 5, 1982).
Brandon Boyd is 41 years old (birthdate: February 15, 1976).
Brandon Gilson is 15-16 years old.
As of the end of the 2013-2014 NFL season Randall Harris is 22 years old.