Donald Joseph Qualls is an American actor. He is best known for his work in films including Road Trip (2000), The New Guy (2002) and The Core (2003), and for several appearances on television series such as Breaking Bad, Supernatural, Scrubs, Lost, CSI: Crime Scene Investigation. He co-starred in the FX comedy series Legit, the Syfy horror series Z Nation and the Amazon Studios show The Man in the High Castle.

Road Trip is a 2000 American road sex comedy film directed by Todd Phillips and written by Scot Armstrong and Phillips. The film stars Breckin Meyer, Seann William Scott, Paulo Costanzo, and DJ Qualls as four college friends who embark on an 1,800-mile (2,900 km) road trip to retrieve an illicit tape mistakenly mailed to a girlfriend. The film gathered a cult following over the years.