Aaron Mclean scored twice as promoted Peterborough cruised past Grimsby.

Mclean coolly sidefooted the opener after being picked out by a precision pass from Tom Williams.

Posh went 2-0 up through Mclean's fine volley from Craig Mackail-Smith's pass but the Mariners hit back back thanks to Martin Butler's close-range strike.

But Mclean found Mackail-Smith to grab the visitors' third from a tight angle and Scott Rendell's stunning right-foot volley sealed the win.

Grimsby: Barnes, Bennett, Atkinson, Fenton, Newey, Bore (Hegarty 55), Bolland, Clarke, Boshell (North 41), Toner (Butler 55), Jarman.
Subs Not Used: Montgomery, Bird.

Booked: Fenton.

Goals: Butler 63.

Peterborough: Lewis, Newton, Morgan, Westwood, Williams, Whelpdale (Potter 64), Hyde, Keates (Lee 83), Boyd, Mclean (Rendell 78), Mackail-Smith.
Subs Not Used: McKeown, Gnakpa.

Goals: Mclean 33, 49, Mackail-Smith 73, Rendell 82.

Att: 4,125.

Ref: Paul Melin (Surrey).