Ben Chorley rescued a point for Orient at Spotland, today.
The centre-back rose highest in the penalty box to head home a corner by Dean Cox on the hour mark.
Earlier, his partner at the back Terrell Forbes had found the net, only at the wrong end of the pitch.
The defender’s header from a Dale corner beat his keeper Jamie Jones at the near post, on 34 minutes.
Chorley's effort salvaged a game which was an affair of two halves for the visitors, after a woeful first 45 minutes.
Orient toiled in the first half to make an impression on Dale, who were dangerous on the wings.
Former loan star Nicky Adams turned out for the hosts and was a threat, until being forced off on the stroke of half time.
Matt Spring’s effort after just three minutes was a rare effort on Josh Lillis’ goal.
Orient improved after the break, Scott McGleish dragged an effort wide near the hour mark.
Jones was superb late on when he athletically saved a goal-bound effort by Chris O’Grady three minutes from time.
Brian Barry-Murphy supplied the cross which beat Orient and put Keith Hill’s side into a well-deserved lead.
Orient dug deep for the draw, which leaves boss Russell Slade’s side in eighteenth place in the League One table, two points above the relegation zone.
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