A third man is being questioned on suspicion of murder in connection with the death of Maltby pensioner Tommy Ward.
The 23-year-old from Sheffield is currently in custody being questioned by detectives and the arrest comes after two other men were also arrested in connection with the incident last October.
A 30-year-old man from Sheffield and a 35-year-old man from Rotherham have also been arrested on suspicion of murder and remain in police custody.
Police carried out executed warrants at addresses in Hackenthorpe, Stradbroke, Aston, Ulley, and Wales.
Mr Ward was found with serious injuries after reportedly being attacked on the morning of Thursday, October 1, 2015, at his home on Salisbury Road in Maltby.
He was immediately taken to hospital where he remained in a critical condition for a number of months. He continued to receive medical treatment however he unfortunately died as a result of his injuries on Tuesday, 23 February this year.
Anyone with any information is urged to police on 101.