Here are some pictures from Tim Christians and Brian Thomson who are both superintendents in the Chicago suburb of Barrington. The storm was last weekend. The hail stones were the size of golf balls and larger and did much of the same damage that a golf ball would do. They ended up having to fix thousands of holes in the same way they would fix a ball mark.
They also had quite a bit of damage to cars in the parking lots.
Tim reports that this hardly slowed the golfers down. Right after the storm, the pro shop sold out of colored golf balls and the players just kept going.