The school said Holliday suffered head injuries and was listed in critical condition at the UNC Trauma Center in Chapel Hill.
The school issued a statement from Duke Head Football Coach David Cutcliffe.
"First and foremost, our thoughts and prayers are with Blair, his parents, Leslie and Rick, and the entire Holliday family. The Holliday family is one of tremendous character and strength, and is truly an inspiration for all of us. Secondly, we could not be more appreciative of the care and support Blair has received here at UNC Hospitals. The doctors, nurses and support staff have been truly outstanding."
Holliday's bio on the Duke website said the sophomore from Sherman Oaks, California is expected to be a starter this fall.