Police said it appeared the man then walked along Mansfield Street and Jane Way into the reserve before looping back to where he was discovered outside a second address Mansfield Street address.
He would have covered a distance of approximately half a kilometre and police would like to speak to anyone who saw a man in this location in the early hours of the morning.
Police believe there is a link between the man's death and an assault on Ohauiti Road near the intersection with Welcome Bay Road.
In this second incident a man suffered hand and facial injuries.
Police also believe that those responsible travelled to both locations in a vehicle and then left those locations in that vehicle a short time later.
The time which is the main focus of the police investigation is between midnight and 1am.
Police expect to be able to release the name of the man who died this afternoon once the post mortem and formal identification have taken place.
Anyone with information is asked to contact Tauranga Police on 07 577 4300.