A spokesman for Vidant Medical Center in Greenville told the (Wilmington, N.C.) Star-News Stanley was listed in critical condition after he and a teammate, offensive tackle Isaac Harris, were involved in a single-vehicle accident Wednesday morning.
Harris, a passenger in a car driven by Stanley, was treated for non-life-threatening injuries and released.
Greenville Police spokeswoman Kristin Hunter told the newspaper the accident was believed to be weather-related as the Carolinas were pelted by an ice storm.
A police report indicated the car veered off the road around 6 a.m. and crashed down an embankment near the Tar River.
The accident report stated "charges are pending," the Star-News reported.
"Terrell is under the best medical care possible, and while he has showed signs of steadily improving, we ask that you keep him in your thoughts and prayers," East Carolina head Coach Ruffin McNeill said.
"His parents, sister and other family members are here with his teammates and coaches, and together we have been and will continue to be a force that runs deep with support and inspiration."