The phrase "outfield fence" refers to a barrier or wall located at the outer edge of the playing field in sports like baseball or softball. It is used to demarcate the boundary between the field of play and the area beyond it. Full definition
«We are very excited to use the new outfield fences for the Piece of the Rock Tournament,» Collins elaborated. (sportstarsmag.com)
RGFSL is also eager to put to good use their newly purchased portable outfield fences that PVT sponsored through a capital improvement grant. (sportstarsmag.com)
Strangely, our original hypothesis that left handed pitchers would benefit from deeper outfield fences in left field was quickly disproved. (sportsinsights.com)