One of the draw backs about playing golf in the winter is the damage done to greens by balls hitting the greens. During the winter the Bentgrass greens are not growing and can easily be damaged by a ball hit to the greens. It is most severe when the greens are frozen. When the ball strikes the green it will kill the turf on that spot. Par 3 are the most troublesome because most shots fly directly to the green, longer holes balls can run up to green. We can have hundreds of spot throughout a green. The good news is the ball marks will fill in as it warms up this spring. Below are some pictures of # 14 green showing the damage.
The white spots are the damaged areas.
Notice the old cup above the knife.
My Leatherman is 4 inches long