According to Rocky Mount authorities, 41-year-old Randy Earl Wilder was knocked out of his boat. He was alone and was not wearing a life jacket.
Police are still working on what may have caused the accident.
Witnesses said Wilder appeared to lose control of the boat.
"It just looked like he tried to do a 360 in the water," said Eric Goff. "And it just knocked him out, and the boat was still on, going around him the whole entire time for about five minutes."
It took rescue workers almost an hour to recover Wilder's body from the Reservior. Police believe he died from the head injuries he suffered when he fell off the boat.
Meanwhile, in Harnett County, 19-year-old Aaron Devon Ray drowned near his home Friday.
Ray reportedly had been wading in the pond with three other people. He was pulled under, and his friends were not able to find him.
It took divers about two hours to find his body. His death has been ruled an accident.