Michael Kirkham, a 30-year-old fighter from South Carolina, died after making his pro debut in Aiken, S.C., on Saturday night.
According to the Associated Press, Aiken County coroner Tim Carlton said Kirkham collapsed following Saturday night's fight at the USC Aiken Convocation Center. He added that Kirkham was taken to Aiken Regional Medical Center and never regained consciousness.
Kirkham, who had been struck several times in the head during the bout, died of a brain hemorrhage Monday morning, according to WRDW.com.
Carlton said an autopsy will be done Tuesday.
This was not Kirkham's first bout; he fought six times as an amateur, including this loss.