Specifically, the right-center and right field walls will be brought closer to home plate.
The Mets will again move in the outfield fences at Citi Field this winter, according to the Daily News. This winter, the team will alter the right-center field and right field walls to bring them closer to home plate. Over the past couple of months, it had sounded like the Mets would eventually end up making the changes.
Of course, this isn't the first time the Mets have made changes to the outfield walls at Citi Field, which opened in 2009. After the 2011 season, the team constructed a mostly new outfield wall that stands eight feet tall—significantly lower than most of the park's original outfields walls—and in front of the old structure. The most drastic changes came in left field, though the right field fence was tweaked in spots, too.
The team also made a tweak to its center field fence after the park's opening season. The home run line in center field, which accounted for the front of the home run apple structure and ran perpendicular to the bottom of that structure's left and right corners, was lowered and evened out as a straight line for the 2010 season.
Per the Daily News report, the Mets are expected to begin construction on the new fence in the coming weeks.