David Thomas "Dave" Mason (born 10 May 1946) is an English singer, songwriter, and guitarist from Worcester, who first found fame with the rock band Traffic. In his long career, Mason has played and recorded with many of the era's most notable rock musicians, including Jimi Hendrix, Delaney Bramlett, Michael Jackson, The Rolling Stones, Eric Clapton, George Harrison, Fleetwood Mac and Cass Elliot. Mason's best known song is "Feelin' Alright", recorded by Traffic in 1968 and later by many other performers, including Joe Cocker, who had a major hit with the song in 1969. For Traffic, he also wrote "Hole in My Shoe", a psychedelic pop song that became a hit in its own right. "We Just Disagree", Mason's 1977 solo hit written by Jim Krueger, has become a staple of Classic Hits and Adult Contemporary radio playlists. Mason's tenure with Traffic was disjointed. He co-founded the group, but left following the recording of their debut album, Mr. Fantasy (1967), only to rejoin halfway through the sessions for their next album, Traffic (1968), after which he left again. Last Exit (1969), a compilation of odds and ends, features little material by Mason apart from his song "Just For You".