
Acting
John Popper (born March 29, 1967) is an American musician and songwriter, known as the co-founder, lead vocalist, and frontman of the rock band Blues Traveler.
Description above from the Wikipedia article John Popper, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Chuck Leavell: The Tree Man
as Self

Sesame Street: Kids' Favorite Country Songs
as Self
Jason Mraz Live: Tonight, Not Again
as Self

Just for the Time Being
as Frankie

Das Clown
as Narrator (voice)

Blues Brothers 2000
as Motel Band

Private Parts
as John Popper

Tibetan Freedom Concert
as Self

American Idol
as Self - Performer · 1 ep.

Selfie
as Self (uncredited) · 1 ep.

Z Rock
20 ep.
My Coolest Years
as Himself · 1 ep.

Jimmy Kimmel Live!
as Self - Musical Guest · 1 ep.

The Daily Show
as Self · 2 ep.

Space Ghost Coast to Coast
1 ep.

Late Show with David Letterman
as Self - Musical Guest · 3 ep.

Roseanne
1 ep.

Saturday Night Live
as Self - Musical Guest · 1 ep.