It’s Jeff ‘Skunk’ Baxter’s Mustache
The guitarist extraordinaire was a big part of the success of both Steely Dan and the Doobie Brothers, and has since gone on to become an in demand musician.
He and singer/keyboardist Michael McDonald have the distinction of moonlighting in both bands during their career.
More recently, Baxter turned up as a keyboardist on Brian Auger's 'Language of the Heart' and providing backing electric guitar for the Beach Boys' 'That's Why God Made the Radio.'