Home People Mark Caso Mark Caso movies Mark Caso movies Mark Caso Movies (3) Teenage Mutant Ninja Turtles III (1993) As Leonardo. He was 40 years old The Making of 'Teenage Mutant Ninja Turtles': Behind the Shells (1991) As Himself. He was 38 years old Teenage Mutant Ninja Turtles II: The Secret of the Ooze (1991) As Leonardo / News Room Staff. He was 38 years old
