His Disney roles include as the current voice of Max Goof since 1995, Kovu in The Lion King II: Simba's Pride, Mungo in Tarzan, Norman Squirelli in Even Stevens, Cavin in Disney's Adventures of the Gummi Bears from Season 4 to Season 6, Tino Tonitini in The Weekenders, Haku in Spirited Away, Matt Olsen in W.I.T.C.H. and various other characters for other Disney projects.
He is best friends with Will Friedle.
- Max Goof (1995–present)
- Disney's Adventures of the Gummi Bears - Cavin (Seasons 4 - 6)
- Hocus Pocus - Thackery Binx (voice, black cat form only)
- The Shnookums and Meat Funny Cartoon Show - Shnookums
- Jungle Cubs - Prince Louie (Season 1 only) and Shere Khan
- The Lion King II: Simba's Pride - Adolescent Kovu
- Tarzan - Mungo
- The Weekenders - Tino Tonitini
- Spirited Away - Haku (English dub)
- Kim Possible - Felix Renton
- Lilo & Stitch: The Series - Baby Jumba and a waiter
- W.I.T.C.H. - Matt Olsen
- Kick Buttowski: Suburban Daredevil - Various
- Epic Mickey 2 - Various
- Monsters University - Various
- DuckTales Remastered - African mine worker
- We Wish You a Merry Walrus - Sydmull
- White Squall - Shay Jennings
- The Lion Guard - Kovu
- DuckTales (2017 series) - Hack Smashnikov, GPS, Babysitter
- Jason is often mistaken for the brother of actor James Marsden. Although the two are not related, they are actually good friends. Their respective wives have been friends since they were six-years-old. This makes the typo in the New Vegas credits even more humorous.