Leyton Orient will face Peterborough United in the League 1 play-offs after easing to a 3-1 win at MK Dons as they finished third in the table. 

The visitors opened the scoring after 17 minutes when Kevin Lisbie headed home and the former Charlton Athletic striker tucked away his second in first-half injury time.

Orient were in complete control and the East Londoners added a third goal in the second half with a fine finish from David Mooney. Ryan Hall scored a late deflected effort but it could not take the shine off an excellent O's win.

With Preston losing at Crewe, Orient were able to leapfrog them and secure third place in the table. 

The O's made two changes with Mathieu Baudry and Elliot Omozusi returning from injury in place of Scott Cuthbert and Shaun Batt. There was also a place on the bench for Marvin Bartley after his lay-off with a hamstring injury. 

It was a quiet start to the match but the visitors struck the opening blow with their first effort. Dean Cox sent in a cross and Lisbie was left unmarked to head the ball into the net. 

Orient had another opportunity after Lisbie laid the ball off to Cox but the winger's shot was comfortably saved by David Martin.

Ryan Hall fired in a shot for the hosts which was straight at Jamie Jones as the hosts struggled to make an impact during the first half.

MK Dons were forced into a change before the break when keeper Martin was injured and Charlie Burns replaced him.

The O's could have doubled their lead through Lisbie but he headed his close-range effort over the bar after a cross from Cox.

Mooney went close early on in the second half but his low shot was well saved by Burns. 

But the Irish striker got off the mark with his 19th league goal of the season as he fired powerfully past Burns in the 56th minute. 

Russell Slade made a couple of changes midway through the half as Lloyd James and Chris Dagnall replaced John Lundstram and Lisbie. 

MK Dons got a consolation they scarcely deserved when Hall's effort was deflected into the net in the 79th minute.

Orient made their final change when Shaun Batt was brought on in place of Mooney.

The O's will now travel to Peterborough for the first leg of the semi-final next Saturday lunchtime as they bid to win promotion to the Championship.

MK Dons: Martin (Burns, 34); Lewinton, Kay, Flanagan, Spence; Hall, Gleeson, Smith (Rasulo, 68), Alli, Kennedy (Powell, 57); McLeod

Subs not used: Randall, Hickford, Loveridge, Summerfield

Leyton Orient: Jones; Omozusi, Clarke, Baudry, Sawyer; Cox, Vincelot, Lundstram (James, 67), Odubajo; Mooney (Batt, 80), Lisbie (Dagnall, 62)

Subs not used: Larkins, Bartley, Simpson, Ness

Referee: Stephen Martin

Attendance: 9,965 (1,334 Orient fans)