David Thomas Mason (born 10 May 1946) is an English singer-songwriter and guitarist from Worcester, who played with the rock band Traffic. While with Traffic, he wrote the psychedelic pop song “Hole in My Shoe“. “Only You Know and I Know” became a signature song for Delaney and Bonnie, and “We Just Disagree“, Mason’s 1977 solo U.S. hit, written by Jim Krueger, has become a staple of U.S. classic hits and adult contemporary radio playlists.

After leaving Traffic he became a session musician, recording for George Harrison, the Rolling Stones, Jimi Hendrix, Eric Clapton, Michael Jackson, David Crosby, Graham Nash, Steve Winwood, Fleetwood Mac, Delaney & Bonnie, Leon Russell, and Cass Elliot.

In 2004, Mason started a new electric guitar company with business partner and industrial designer Ravi Sawhney, the same year as he was inducted into the Rock and Roll Hall of Fame as a founding member of Traffic.