Hole in outfield fence at the base of the fence.

[waltjp]

If were told during the plate conference that there are spots in the outfield that would allow a ball to pass through or under a fence we make a point of telling the managers that the outfielder should raise his hand so the base ump can go out and check. We also tell the managers that the runners should keep running - we'll reset them if the ball is indeed, out of play. Our final statement is that if the fielder reaches for the ball after raising his hand we're going to judge that the ball is still in play.