It will be No. 7 this week, with McGregor shifting him back to his preferred position after Adam Clune was ruled out of Thursday's clash with the Rabbitohs with concussion.

It will, briefly at least, suspend his stint as first-choice dummy-half since being shifted there six weeks ago in an effort to reboot the Dragons season.

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It's worked to good effect, with the 30-year-old nudging top form since making the switch, but McGregor didn't hesitate to shift him back once Clune was ruled out.

"I think whatever Ben does no one's ever going to be happy with," McGregor said.

"He seems to be a player people really go after consistently but he's a very good footballer, he's experienced and he'll do a good job.

"It's a forced change, we've got two [Clune and Trent Merrin] guys with HIA's from the game and with the five-day turn it wasn't the right thing by them or the team to put them out there.

"Ben and Cam [McInnes] know how to play seven and nine because they've done it most of their careers. Ben likes to play seven so he's back to his preferred position.

"He's an experienced player and he teams up with Corey [Norman] who he's played a lot of football with. Corey's got a milestone of 200 [games] so I expect my halves to lead us around the field well."

The reshuffle sees Tristan Sailor called in for his first top-grade appearance. There's been speculation he could start in the halves, but McGregor said the 22-year-old is there for his all-round utility value.

"His best position is one, for sure, but he's played a lot of six in his life," McGregor said.

"The versatility around Tristan is good because the move of Ben to nine had a lot to do with what middles we didn't have available and [having] the ball-playing middle we need in Cam going to 13.

"There's an opportunity there if we need a little it more out of our middle we can move Benny to nine and Cam to 13 and put Tristan straight onto that edge.

"He's done some work there before and he's done a lot of work there the last couple of days there, he knows the systems. He's been 18th man for five or six weeks so he was ready for the opportunity, now it's there."

McGregor was left fuming with the bunker howler that gifted the Sharks a try in their win over the Dragons last week.

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It prompted Graham Annesley to immediately stand down bunker officials Steve Clark and Ben Galea, but McGregor said it was time to move past it.

"That's strong leadership from Graham, it's not my department and that's what I meant around accountability, nothing sinister," McGregor said.

"I got asked a question, I didn't raise it, and it was very fresh. At this stage, or any stage, it's not good enough to make decision when you have the correct material to make the right decisions.

"Two looks, early in the game, slippery conditions, it just needed a closer look. The thing with the bunker is, if they take time to make the decision no one's happy, if they don't take enough time and get the decision wrong, no one's happy.

"If it takes longer than people feel it needs but the right decision comes out of it, that's the right thing to do. Graham showed strong leadership in what was next, let's move on."