FLINT, Mich. — Claressa Shields called the altercation before Friday’s weigh-in “inexcusable” after her opponent’s trainer was hospitalized and her fight Saturday night was called off. Shields was supposed to fight Ivana Habazin on Saturday, but the bout was canceled. Mlive.com reported that James Ali Bashir, Habazin’s trainer, had facial injuries after he was punched