Blackbeard's Ghost

Released in 1968, Blackbeard’s Ghost based upon the novel of the same name starred Peter Ustinov as Blackbeard, Dean Jones and Suzanne Pleshette and it is a Disney film.
Blackbeard’s Ghost is a fun film with Ustinov as the ghost of Blackbeard and Jones as the hapless living person who got embroiled with him.
Jones plays a football coach and Blackbeard was certainly helpful to his team.
They also made a good team against a local crime boss.