The family of a Douglas County High School football player who collapsed after practice is preparing to take the teen off life support.

The family of 17-year-old Zyrees Oliver told Channel 2’s Jessica Jaglois that Oliver is brain dead after suffering from water intoxication. The family said Oliver drank 4 gallons of fluid during football practice on Tuesday.

“We're talking about a 3.8 GPA student, healthy, waiting to go to college to play football,” said Oliver’s aunt Tammy Chavis. “He had his whole life.”

Chavis says it’s a matter of hours, maybe days, before her nephew is taken off life support at Wellstar Kennestone hospital.

“He's lying in a hospital on a ventilator,” said Chavis.

She says the Douglas County senior complained that he was cramping during football practice Tuesday night because of dehydration. She says, the teen drank 2 gallons of water and 2 gallons of Gatorade

“You think with dehydration, the more water you give, the better you're making it. No, not in all cases, it does the opposite,” said Chavis.

Chavis says Oliver couldn't drive home and when his mother came to pick him up from school he seemed to be doing better. He later collapsed at home and was airlifted to the hospital early Wednesday morning.

“The water flooded his system and his brain started to swell,” said Oliver’s cousin Bryan Stewart. “I believed he wasn't going to come out of it.”

Stewart said his family was praying for a miracle, but now any hope has been lost.

“To see him go at 17, (He) couldn’t have a family, couldn't do anything, (He was) ready to go to college,” said Stewart. “It's just very hurtful.”

The family says Oliver is originally from New Jersey and they are collecting money through PayPal to eventually fly his body back home.

Students wore their school colors to classes Friday to show their support.