This was in the back yard of house where i worked today. Looks like hickory, but one im not familiar with. Appears to have been planted there. Could it be pecan?
Pictures match up with what Google shows... Northern Pecan. All the Hickories I've seen in the area lately have dropped all their leaves by now.
Without the leaf pics I would have said bitternut hickory but leaves and nut say pecan as others have said. Looks like some sap sucker damage with all those holes