Home People Jeff 'Swampy' Marsh Jeff 'Swampy' Marsh shows Jeff 'Swampy' Marsh shows Jeff 'Swampy' Marsh TV Shows (6) Milo Murphy's Law (2016) He was 55 years old Phineas and Ferb (2007) As Francis Monogram (voice), He was 46 years old Phineas and Ferb (2007) He was 46 years old Phineas and Ferb (2007) He was 46 years old Phineas and Ferb (2007) He was 46 years old Aaagh! It's the Mr. Hell Show! (2001) As Josh, He was 40 years old
