Dr. Dan Matrazzo will play keys with the John Scofield Uberjam and the reunited Aquarium Rescue Unit at Warren Haynes’ Christmas Jam on Saturday. Matrazzo—who was an early ARU collaborator—will also be guesting during some of the Christmas Jam by Day shows.

The 25th annual Christmas Jam will take place this weekend at this Friday and Saturday at the US Cellular Center in Asheville, NC. Gov’t Mule, Phil Lesh Quintet, Widespread Panic, Aquarium Rescue Unit, Gregg Allman, Grace Potter and The Nocturnals, John Scofield Uberjam, Sco-Mule and many more will perform at the event, along with a number of special guests. As previously reported, the concerts will be streamed by TourGigs.