I understand what you are trying to say. It is possible that he just doesn't have enough head control to hold his head upright yet. Or, he could have some torticollis. Torticollis can be present from birth, or happen after birth due to positioning and/or reflux. Usually you will see a baby hold their head to only 1 side in all positions, not just upright, and tilt their head to the opposite side. If they turn their head to the left, for example, they will also tilt their head to the right at the same time. I often notice it in babies who are positioned to one side all the time in their seat (carseat, bouncy seat, swing, etc). I will also see it in family photos if you notice the baby always turned to one side in all photos. Mild cases often resolve on their own with good positioning as the baby gets stronger. However, if the baby does have torticollis, a pediatric physical therapist can often give you some help with "tricks" for positioning and in more severe cases stretching. It is important to catch it early to prevent flattening of the head and asymmetrical face growth and to help him develop his motor skills (sitting, crawling, etc) without problem. If you think this might be what is happening to your grandson, please have your pediatrician check for tightness. It may be nothing, or it may be the beginnings of something that you fix easily if caught early. Hope this helps!