At 5-foot-3 and 135 pounds, Michael Greenberg was the lightest sumo competitor at the 14th annual U.S. Sumo Open on Sept. 20 — by a lot. But according to the young Jew from Long Beach, his svelte ...

For a lightweight sumo wrestler, unpredictability may be the key to success. Small wrestlers even the odds by using a diverse range of tactics, say ecologists. The same could happen in unequal ...