Yokozuna Terunofuji, who bounced back from surgery on both knees to win May's grand tournament, withdrew Wednesday from the ongoing Nagoya Grand Sumo Tournament due to a herniated disk.The 31-year-old Mongolian-born grand champion won his first day's match Sunday, when the 15-day tourney opened at Nagoya's Dolphins Arena, but a second straight defeat Tuesday raised questions about his fittness.Terunofuji withdrew during last September's grand tournament and had procedures done on both knees in October. After skipping three straight tournaments, he returned in triumph with his eighth career …READ FULL ARTICLE