Clive Allen admitted his reserve side paid the price for defensive errors as they slipped to a 2-0 defeat against Stoke on Monday night.
In a match that featured a number of first-team squad players on both sides, Stoke took the initiative in first half injury time with a goal from Danny Pugh and then just minutes after Adel Taarabt struck the woodwork, Michael Tonge sidefooted home the second goal to give the visitors a lead we never really looked like reducing.
"We paid the price for poor defending," stated Development Coach Clive at Leyton Orient. "I didn't think Stoke were much of a threat in the first half but they then scored on the stroke of halftime when we didn't defend a cross and left a player unmarked at the far post.
"You just can't give away opportunities like that.
"I actually thought we were okay in the first half and that we had the better of it without creating too many clear-cut chances.
"The second half was as poor as we've played all season.
"We had a reasonable amount of possession without looking a threat and created one or two chances without having that real cutting edge.
"We were then punished for more sloppy play when we conceded the second goal. Overall, it was disappointing and we'll have to bounce back."
One bright spot was the return from injury of Kieran McKenna, who played for just under an hour and impressedin his holding midfield role. "It was great to see him back," said Clive. "You can see he's full of energy and endeavour. It will take him time to get fully back into the swing of things but I'm pleased he's back on the pitch."
Meanwhile, there were updates on injured reserve squad players Danny Rose (knee ligament), Cian Hughton (ankle sprain) and Jake Livermore (foot).
"They are all progressing well," added Clive. "Jake and Cian are working very hard and Danny is following the regime set out by the medical department, building his knee up stage by stage and at this point, doing very well.
"They were long-term injuries, always very frustating, but they are all working tirelessly to get back as soon as they can."