  The in-plane magnetoresistance (MR) of a single crystal
La_{1.97}Sr_{0.03}CuO_{4} has been studied at low temperatures T using several
experimental protocols. At T well below the spin-glass transition temperature,
the MR becomes positive and exhibits several glassy features, such as history
dependence, memory and hysteresis. These observations are qualitatively similar
to the previously reported behavior of the out-of-plane resistance. The results
suggest that the memory effects in the MR are related to the onset of
glassiness in the dynamics of doped holes.
