Braves outfielder Jason Heyward sustained two jaw fractures when he was struck by a pitch Wednesday and will undergo surgery Thursday. The Braves said Heyward's jaw has been stabilized, and he was to return to Atlanta on Wednesday night in advance of the operation. How much time Heyward will be sidelined is expected to be announced after the operation, but MLB.com estimated he would be out for 4-6 weeks. Heyward was beaned by a 90 mph fastball from New York Mets left-hander Jonathon Niese in the sixth inning of the Braves' 4-1, 10-inning win on Wednesday. The impact made a loud noise, and the crowd groaned as Heyward crumpled to the ground. Source: ESPN