Former Chester City Football Club owner Stephen Vaughan and one of his sons have been arrested on suspicion of assaulting a police officer.
The officer had to be treated for a fractured cheekbone after the alleged attack at the Jug and Bottle hotel in Heswall, Wirral, Merseyside on 4 April.
Police said he was assaulted after investigating reports of a disturbance.
Mr Vaughan, his son Stephen junior and another man were arrested on suspicion of affray and assault.
A police spokesman confirmed two men from Heswall, aged 48 and 25, and a third man from Neston were released on bail pending further inquiries.
He said: "The officer was investigating the earlier disturbance at the Jug and Bottle hotel when he was assaulted by three men at around 10.55pm on Thurstaston Road in Heswall."
Stephen Vaughan took over as chairman and majority shareholder of Chester City FC in 2001, but the club was wound up last month over an outstanding tax bill.
Stephen Vaughan junior is a former captain of the club who now plays for Liverpool club Marine FC.