Random distributed feedback fiber Raman lasers, where the feedback mechanism is provided by

Rayleigh backscattering, have attracted a good deal of attention since they were first introduced

in 2010. Their simple and flexible design, combined with good lasing efficiency and beam quality

properties, comparable to those of standard cavity lasers, have led to multiple applications, particularly

in the fields of fiber sensing and optical communications. In spite of these advances, the polarization

properties of random fiber Raman lasers, which can strongly affect their performance in both

sensing and communications, have barely been explored so far. In this article we experimentally and

theoretically study the polarization properties of different open-cavity laser designs, based on either

standard transmission fibers or low polarization-mode-dispersion spun fibers. By using high-power,

highly-polarized pumps, we demonstrate controllable polarization-pulling and simultaneous lasing at

close wavelengths with different output polarization properties in random distributed feedback fiber

Raman lasers. These results advance our understanding of the polarization dynamics in ultralong lasers,

and pave the way to the design of novel fiber laser sources capable of polarization-sensitive sensing and

distributed amplification.