Optical Burst Switching (OBS) is a promising switching paradigm to efficiently support Internet Protocol (IP) traffic over optical networks, under the current and foreseeable limitations of optical technology. OBS network performance is mainly hampered at the network nodes by resource contention between bursts directed to the same output link. This paper presents a multi-path routing strategy for minimizing contention in OBS networks. Simulation results show that the proposed routing strategy reduces burst blocking probability as compared with single-path routing strategies.