Former Magpies striker Carroll made his first Premier League start in more than eight months when the Hammers lost 2-0 to Watford at the weekend.
While Carroll is enjoying life as an honorary cockney with the high-flying Hammers, he revealed he still keeps a close eye on things back home.
And things aren't looking good.
Newcastle find themselves in the middle of yet another relegation battle, and to rub salt in the wound were beaten 3-0 by fierce rivals Sunderland at the Stadium of Light last weekend.
A 0-0 draw against Stoke City since has done little to improve the mood.
It leaves McClaren's struggling side 18th in the Premier League table and their former England boss has presided over just one league victory since taking the helm at St James' Park in the summer.
And he was even forced to issue a grovelling apology to supporters following the Sunderland capitulation telling fans, as covered by the Daily Mail: "(The) derby defeat hurt us all and everyone is sorry that we couldn't deliver you the victory you deserved."
Carroll backs old club
Despite the continued turbulence at the club he left Liverpool for in a record £35 million deal - price reported by the BBC - Carroll has showed he still cares for the Magpies by insisting they will stay up this season despite a terrible start to life under Steve McClaren.
"Yeah, I think they will (stay up), you know," he told Sky Sports.
"I think it's tough, and they haven't been getting the results that they need.
"But I think the manager has taken over there and I think he will turn it around."
So there you have it, the big Geordie has high hopes for McClaren's battlers.
Next three games crucial
But if they are to prove him right they must start picking up some results, and fast.
Now is as good a time as any to start the revival, too, with three winnable matches on the horizon.
The Magpies travel to out of sorts Bournemouth on Saturday before entertaining Leicester City at St James' Park after the international break and taking on old manager Alan Pardew and his Crystal Palace side on the road a week later.
Fail to pick up points in those games and things start to look increasingly difficult for McClaren's side, as they then face Jurgen Klopp's Liverpool and their fellow Champions League hopefuls Tottenham Hotspur after that.