By Joe Koizumi Photos by Sumio Yamada WBO 105-pound champ Ryuya Yamanaka (16-2, 5 KOs), 105, impressively kept his belt in his initial defense as he was awarded a TKO victory after the eighth round when Mexican Moises Calleros (28-8-1, 16 KOs), 105, quit on the stool because of his absorption of punishment in the […]
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