【プロ野球・ポスティング】MLB公式「山口俊はプレミア決勝で先発して1回3失点、一昨年は警備員に怪我もさせた」
During Yamaguchi's first season with Yomiuri in 2017, he was suspended for the second half after being charged with causing bodily harm to a hospital security guard and damaged to hospital property while intoxicated. He reportedly was at the hospital to get treatment on his pitching hand.
巨人入りした2017年のシーズンで、山口は酔って病院の警備員に傷害を負わせ病院の器物を損壊したとの容疑をかけられた後、後半戦出場停止処分となった。