"I'm getting treatment, doing a lot of stretching and trying to get this thing loosened up a little bit better and make it a little easier to move around," Heyward said. "These past couple days, it's been pretty tight."
Heyward's back began bothering him after he ranged into foul territory attempting to catch a ball during Thursday night's game against the Marlins. The 24-year-old right fielder played through discomfort the next two days, but sat on Sunday and played just three innings during Monday's series finale against the Padres.
"[The flight] wasn't the most comfortable thing to sit through," Heyward said. "I did get up and walk around. It didn't kill me on the fight, but it didn't help me either."
Mark Bowman is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.