There are 4 artists with this name. The first (and most documented) of which is Mutt: Sean Roman, a Canadian drum & bass/liquid funk producer and DJ. He also has a fangroup at Last.fm. Mutt has released several EPs, and one album entitled "treading water".
Lady Love / The Motions - Single (1st August 2008)
Kush Talk / Draw On Me - EP (1st January 2007) Mutt is also the name of a Mexican (Catchy) Jazz/Traditional Pop band from Torreon, Coahuila.

Read more about Mutt on Last.fm.