Duke basketball: 2020 C Mark Williams mocks Crystal Ball

The Duke basketball recruiters appear to be the overwhelming favorites in one winding-down battle, but the target pointed out how one shouldn’t pay too much attention to prognosticators.

On Thursday, insider Andrew Slater entered a 247Sports Crystal Ball pick pegging IMG Academy (Fla.) four-star center Mark Williams to join a Duke basketball class that already includes three five-stars — point guard Jeremy Roach, combo guard D.J. Steward, and small forward Jalen Johnson — in addition to four-star power forwards Henry Coleman and Jaemyn Brakefield.

All nine picks for Williams, who ranks No. 29 on the 247Sports 2020 Composite, are now in agreement. So the 7-foot-1, 225-pounder — Coleman’s best…