First-half strikes by Aaron Wilbraham and Mark Wright earned MK Dons a comfortable win over visitors Grimsby.
The League Two leaders went ahead within 30 seconds when Wilbraham got on the end of strike partner Leon Knight's cross to head past Phil Barnes.
Wright curled home from 12 yards close to half-time, before Colin Cameron to hit the post from the penalty spot.
The Dons dominated the second half without scoring, Grimsby failing to test home keeper Willy Gueret at all.
Milton Keynes Dons: Gueret, Lewington, Diallo, O'Hanlon, Wright, Wilbraham (Broughton 87), Navarro, Johnson (Smart 77), Knight (Gallen 54), Swailes, Cameron.
Subs Not Used: Edds, Abbey.
Goals: Wilbraham 1, Wright 41.
Grimsby: Barnes, Clarke (Jarman 25), Newey, Hunt, Bennett, Till (Taylor 62), Toner (Hegarty 46), Boshell, Logan, Whittle, Butler.
Subs Not Used: Montgomery, Jones.
Booked: Hegarty.
Att: 6,797
Ref: Steve Bratt (W Midlands).
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