I've never heard it mentioned who played lead guitar on John Sebastion's song, "Welcome Back." Personally, I think it sounds a lot like the mysterious Zal Yanovsky, who was the guitarist in the Lovin' Spoonful, John's original band. Their biggest hits were "Summer in the City," and "Do You Believe in Magic."

Possibly the only person on the planet who would know for sure is John Sebastion.