Officers who were searching for a missing man were alerted to Bentley West Playing Fields on Churchill Road in Walsall at around 7am on Friday.
Paramedics and police attended the scene and found a man collapsed in the field.
West Midlands Police have confirmed the death is not being treated as suspicious, and has been referred to the coroner.
A spokesman for the West Midlands Ambulance Service said, "We were called at 7:04am to Bentley West Playing Fields in Churchill Road.
"We sent two ambulances and a paramedic officer to the scene. On arrival, crews found a man.
"Sadly it quickly became clear nothing could be done to save them and they were confirmed deceased on scene.”