Pearl Jam guitarist Mike McCready joined Louisiana rockers The Revivalists for a rendition of the Allman Brothers Band classic “Whipping Post” at a benefit concert in New Orleans this past weekend. The collaboration took place at Gleason Gras, a musical celebration to raise awareness about ALS, a terminal neuromuscular disease. The event was named after former New Orleans Saints player Steve Gleason, who was diagnosed with ALS earlier this year. McCready also played with Trombone Shorty & Orleans Avenue at the event. You can watch the video of McCready and The Revivalists doing “Whipping Post” above. You can watch another video of McCready, this time with Trombone Shorty & Orleans Avenue, below.