Bryan Stow had been showing some progress, but a recurrence of seizures Saturday prompted doctors to put him back in a medically-induced coma to help reduce the seizure activity.
Stow remains in critical condition and doctors plan to continue monitoring him closely in the coming days.
His family remains at his bedside.
Meanwhile, police are still looking for the two suspects responsible for the beating. Anyone with information is urged to call the LAPD tip line at (877) LAPD-24-7.