The Raiders skipper, who was sitting alongside Stuart when he called Penrith half Jaeman Salmon a "weak-gutted dog" in Saturday's post-match press conference, said the controversy wouldn't distract the team at a critical stage of their season.
Stuart has copped a $25,000 fine along with a week-long coaching ban, denying him any involvement with the side across the next seven days.
Overshadowed by the storm over Stuart's comments is the fact the Raiders' season is teetering on the brink. They are one game and considerable point differential behind the eighth-ranked Sydney Roosters with four games to play following their loss to the Panthers.
In a week dominated by unwanted headlines about their coach, Whitehead said his players stood by him.
"We've got his back, he had his reasons," Whitehead told reporters on Tuesday.
"I'm not going to go into them but we're all supportive of Ricky and he knows he probably shouldn't have said it on that platform.
"He's upset he let his emotions get the better of him."
Brett White will reportedly take the reins in Stuart's absence, although a Canberra statement released on Tuesday said "assistant coaches will take charge of the team during this period and for the game on Sunday afternoon".
A former Raiders player, White faces a daunting challenge in his first game at the helm as he tries to steer the side to the first of four consecutive wins they likely need to play finals.
Whitehead said their gameplan would need to come to the fore to make his job as easy as possible.
"Whoever comes in, nothing changes ... we've got a gameplan that we've got to stick to, we've used that for the last couple of weeks so nothing will change in that department either," he said.
"As a club we're moving forward and not trying to worry about last week, we've got a job to do this week and that's to win a game of footy.
"We are disappointed we lost last week but we're trying to bounce back from that because we have to."
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