The problem with 'mentor' or any other terminology of its kind is that it assumes both seniority and superiority and inferiority.
Not necessarily in a negative context of course but still its a trap.....
Its more suited to university 1st year students than a senior coach of an AFL side.
Yeah. In other contexts that sort of mentor role is more likely to be described as a coach -- but of course 'coach' already means something else in football.