  We study metallic transport in an effective model that describes the coupling
of electrons to fluctuating magnetic moments with full SU(2) symmetry,
exhibiting characteristic behavior of metals at the approach of the Mott
transition. We show that scattering by fluctuating local moments causes a fully
incoherent regime of electron transport with linear T-dependent resistivities.
This strange metal regime is characterized by almost universal, "Planckian"
slope and a finite intercept at $T=0$, that we can associate respectively to
the fluctuations in orientation and amplitude of the local moments. Our results
indicate a route for understanding the microscopic origin of strange metal
behavior that is unrelated to quantum criticality and does not rely on the
existence of quasiparticles.
