Yokozuna Hoshoryu pulled out Monday from the Summer Grand Sumo Tournament after injuring his right hamstring in his opening bout the previous day.The 26-year-old grand champion limped from the ring and was carried in a wheelchair following his Day 1 loss to komusubi Takayasu at Tokyo's Ryogoku Kokugikan arena.Hoshoryu's stablemaster said the Mongolian-born grappler had no option to remain in the tournament after being unable to walk later Sunday night."It seems like something snapped," said stablemaster Tatsunami, formerly komusubi Asahiyutaka. "He had been in good shape and perhaps let his…READ FULL ARTICLE