Late joining up for pre-season training as he recovered from a foot injury that ended last term early, Smalling was introduced as a substitute in the Community Shield win over Wigan last month.
He has been an unused substitute three times since but last Saturday against Crystal Palace did not even make it on to the bench as Moyes searched for the winning formula.
Smalling was selected for last night's Champions League win over Bayer Leverkusen, although it was in the right-back role the former Fulham man has not always appeared comfortable in.
However, Smalling accepts as Moyes finds his feet in his new surroundings, he just has to wait, knowing his manager does not have quite the same scope for experimentation as Sir Alex Ferguson had.
"It is very true," said the 23-year-old.
"He has to go with what he feels. The ones like myself who have not been in the starting line-up just have to make sure in training we do as well as we can so that when we get our chance, we let him know we are here and he doesn't forget about us."
It must be hard for Smalling though.
As the Londoner pointed out, he has been fit since travelling out to Japan for the final three games of United's pre-season, which must be a blessed relief given the bad luck he has endured in recent months.
Ruled out of contention for a spot in Roy Hodgson's squad at Euro 2012 after breaking his foot, Smalling has struggled to complete a run of games since.
Smalling was sidelined until November last term, then had a thigh injury before further surgery was required on his foot.
It is a catalogue of woe the defender is anxious not to continue.
"Last season was very frustrating for me," he said.
"The first three months and the last two were horrible.
"I am just crossing my fingers I stay fit now. I have been okay since the start of the season and whilst right-back is not my preferred position but I know I can play there if I need to."
Amazingly, it was Smalling's 19th Champions League appearance for United, a legacy of his debut season at United when he featured in virtually all the early matches as Ferguson steered his team to the final, where they were beaten by Barcelona for the second time in three years.
Now Moyes has the task of pushing United forward, with Smalling accepting United's vastly experienced group of players must assume responsibility for guiding the club through their present transitional phase.
"If the players don't stick together you don't have any hope," he said.
"But we have a very tight knit group here. You could see that by the way we responded against Leverkusen.
"Even when they scored their first goal we didn't let our heads drop. We were determined to go up the other end and make them pay. And we did."
Now Smalling can only hope he retains his place for one of the most eagerly-anticipated fixtures of the entire campaign, Sunday's trip to Manchester City.
"It is a game we all relish," he said.
"Really, it is even better going to their stadium to try and get a result than it is our own.
"We know they will try to push our backs to the wall. But we will be ready and we will come out fighting.
"No-one will ever forget what happened last season.
"If ever there was a way you could choose to win a game, in the last minute, away from home, against your biggest rivals, that was it.
"The celebrations afterwards were brilliant and we want more of the same."
Smalling was very impressive against Bayer Leverkusen. I think he looked positive going forward and thats how Valencia managed to get pass a few defenders as well.- deepster