Zummo has been a featured guitar soloist on numerous albums, including Art Garfunkel (Up 'til Now), Shawn Colvin (Fat City), Roger Daltrey (Rocks in the Head), Paul Carrack (Groove Approved), Marti Jones (Birthday Suit), Dee Carstensen (Regarding The Soul), Nenad Bach (Greatest Hits), Dawn Avery (True), Jamie de Roy (The Child In Me Vol.
1 & 2), Danny Wilensky (And Then Some), and Leslie Nuss (Action Hero Superstar) as well as the self produced Modern Marriage by The Zummos on A&M Records.
Recently, Zummo contributed guitar to the song "No Hero" from the eponymously-titled album from the band Orbis Max (2023).
[3][4][5][6] Zummo has eight solo albums available: Swinging Guitar Sounds of Young America Volumes 1, 2 and 3, Retro Cool Bossa Nova Christmas Volumes 1 and 2, Retro Cool Mixed Bag Christmas, The Coyote, and Jazz Album.
All About Jazz said about The Coyote: "It's a remarkable sound, and it elevates the proceedings into a different class from the average bebop guitar album.