McKamey's mother said he was showing "very little response" but that they had seen "some very small improvements and reactions to light."
Navy also issued a statement late Saturday afternoon.
"The entire Naval Academy family is shaken by this turn of events and we are providing all the support we can to Will and his family."
As McKamey's mother mentioned in the statement, this is not the first time this has happened. While a senior in high school, McKamey collapsed on the field during a game and had to be airlifted to a local hospital. He was treated at the hospital then but did not undergo surgery.
McKamey would not return during his senior season, but he would be named Mr. Football in the state of Tennessee in 2012.