South Yorkshire Police said the death of the 32-year-old is being treated as ‘suspicious’.
The force said emergency services were called to Fretson Green, Manor, at 12.34am after reports that a 32-year-old man had been seriously injured.
He was pronounced dead at the scene and a police probe was launched.
Detective Chief Inspector Mark Oughton, investigating the death, said: “I know this incident will concern the community who live in the Manor area and I’d like to reassure the public that we are doing all we can to find those responsible.
“My appeal today is for anyone who has information about what happened this morning to please come forward and talk to us. Were you in the Fretson Green area either before 12.30am or just after? Did you hear or see anything that was unusual?
“Did you capture any people or vehicles on your CCTV cameras or dash cams? Even something that seems insignificant or routine could be vital to our investigation.
“There will be significant number of officers in the area over the coming days, they will be continuing with house to house enquiries and searches. If you have concerns, please do talk to them, they are there to offer you help and support.”
Anyone with information should call South Yorkshire Police on 101 and quote incident number 29 of April 17.
Crimestoppers can also be contacted, anonymously, on 0800 555111.