The 17-year-old was knifed when violence flared on Wellington Street, in the Devonshire Green area, at 11.10pm on Saturday, June 12.
South Yorkshire Police said: “It was reported there was an altercation between a group of people. A 17-year-old boy was taken to hospital with minor injuries and was discharged a short time later.
“Enquiries are continuing and anybody with information should contact the police.”
Call 101 and quote incident 1,224 of June 12.