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Former strawweight titlist Ryuya Yamanaka (16-3, 5 KOs), 23, of Japan, announced his retirement on Saturday due to a brain bleed suffered in the unanimous decision loss that cost him his 105-pound belt against Vic Saludar on July 13 in his hometown of Kobe. Yamanaka, complaining of a headache, was taken the hospital after the fight where the brain bleed was diagnosed. He did not need surgery and is OK but the injury necessitated his retirement. Yamanaka won the belt by unanimous decision from Tatsuya Fukuhara in August 2017 and made one successful defense, an eighth-round knockout of Moises Calleros in March, before losing the title to Saludar.

Dan Rafael, ESPN Senior Writer23d ago