De Jong’s header was his 15th goal of the season and extended his lead in the scoring charts as the champions moved to 47 points, behind Ajax who were held to a 0-0 home draw by Heracles on Tuesday.
Jorrit Hendrix hammered home an errant clearance for the second soon after halftime and Luciano Narsingh made it 3-0. An own goal from Dutch international Jeffrey Bruma gave the home side a late consolation.
Christian Santos scored his 13th goal of the season for NEC Nijmegen as they beat troubled Twente Enschede 2-0 to go fourth in the standings.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Last season’s second division champions moved on to 34 points, pushing Heracles Almelo down to fifth after they drew 0-0 at Ajax on Tuesday.
Two goals from Vincent Janssen and another from Joris van Overeem put AZ Alkmaar three goals ahead inside the opening 20 minutes against struggling SC Cambuur. They won 3-1 to move up to ninth.
De Graafschap posted only their third victory of the season but remained at the foot of the table after coming from a goal down at home to beat ADO Den Haag 3-1. They are on 11 points, two less than second-bottom Cambuur.
(Reporting by Mark Gleeson; Editing by Ed Osmond)
