  Starting from a recently constructed stealth Kerr solution of higher order
scalar tensor theory involving scalar hair, we analytically construct disformal
versions of the Kerr spacetime with a constant degree of disformality and a
regular scalar field. While the disformed metric has only a ring singularity
and asymptotically is quite similar to Kerr, it is found to be neither Ricci
flat nor circular. Non-circularity has far reaching consequences on the
structure of the solution. As we approach the rotating compact object from
asymptotic infinity we find a static limit ergosurface similar to the Kerr
spacetime with an enclosed ergoregion. However, the stationary limit of
infalling observers is found to be a timelike hypersurface. A candidate event
horizon is found in the interior of this stationary limit surface. It is a null
hypersurface generated by a null congruence of light rays which are no longer
Killing vectors. Under a mild regularity assumption, we find that the candidate
surface is indeed an event horizon and the disformed Kerr metric is therefore a
black hole quite distinct from the Kerr solution.
