Daytona International Speedway president Joie Chitwood said one fan was in stable condition in a local hospital after being struck by debris from a last-lap wreck in the Coke Zero 400.
A track spokesman announced at 4:50 a.m. ET Monday that the fan had been treated and released from Halifax Health Medical Center.
Chitwood said four more fans in the grandstands were treated and released on property. Eight more declined treatment.