The Canton Post of The Ohio State Highway Patrol is investigating a crash that occurred early Sunday morning.
33-year-old Justin Eslich of Massilon lost control of his motorcycle, striking a a traffic sign on Louisville Street in Stark County.
After impact, the motorcycle overturned and Eslich was ejected.
Eslich was not wearing a helmet, did not have a motorcycle endorsement, and officials believe alcohol was a factor in the accident.
He was transported to Mercy Medical Center with life-threatening injuries.