Cowboys prop Jordan McLean.

Without wanting to sound like a broken record about refereeing decisions, Cowboys coach Paul Green was ruing the fact that two disallowed tries early in the game nullified his side's chances of trying to upset the Wests Tigers at Leichhardt.

Instead a forward pass ruled against Michael Morgan, who had put back-rower Shane Wright in the clear, and an obstruction by Wright on Tigers half Luke Brooks that denied winger Kyle Feldt try led to more heartbreak for a side down on their luck.

The Tigers raced unchallenged to a 16-0 lead in the first half and eventually won the game 28-4.

"Early there was a couple of decisions that went against us, which I don't necessarily agree with," Green said.

"But we've got to move on from those two. But you can't discount it either. It made a huge difference in the context of the game.

"We had two tries taken off us in that first half which were questionable in my opinion. And then that does eat away at your confidence a bit and it makes it harder, particularly when you're close but not quite there yet as a team."

He will scan the video footage first before deciding if he will pick up the phone to NRL referees boss Bernie Sutton.

"If I think it will help I will. There's been plenty of times that I have contacted him although I don't think too much has changed."

Green felt his team losing by 24 points wasn't an accurate reflection of the game. To a point he was right as the Cowboys made far fewer ineffective tackles, more offloads (10-3), won the penalty count, and only made 10 fewer runs in attack than the Tigers.

"When we got our footy on, we were creating plenty of opportunities. But again you can't discount that kind of scoreline so we need to be a bit more mentally tough," Green said.

"There are a few young guys in the side learning some tough lessons. But in saying that we still should have shown a bit more steel and not concede the way we did."

While swapping regular back-rower Coen Hess into the centres has been a new development – his second game out on the left flank – Green didn't have much choice with injuries to his backs.

"He's doing a job for us. Defensively obviously he's not done too much out there in his career so far.

"But I thought his work rate was good."

The Cowboys are without Ben Hampton (biceps), Jordan Kahu (eye socket), and Justin O'Neill (spleen) and they are home to the Broncos next Thursday night.