McDonald reunited as a guest performer with the Doobie Brothers several times since the band's initial dissolution in 1982. He reteamed with the Doobie Brothers for the track "Don't Say Goodbye" on the band's 13th studio album, "World Gone Crazy" (2010). In March 2014, he reunited with the Doobie Brothers to record a new album featuring the greatest hits of the Doobies' 40-plus-year career. This project was completed in conjunction with Sony Music Nashville. On the album, McDonald shares lead vocals with Sara Evans for "What a Fool Believes", Love and Theft for "Takin' it to the Streets", and Amanda Sudano-Ramirez for "You Belong to Me". The album, titled "Southbound", was released on November 4, 2014, as the Doobie Brothers' 14th studio album.