On a day when it was confirmed that striker Kevin Doyle could be sidelined for up to eight weeks with a torn medial ligament, the 72-year-old Italian, as expected, named James McCarthy in his starting line-up for the friendly against Uruguay.
Trapattoni has hinted that the 20-year-old Wigan midfielder's long-term international role could be playing in the hole behind a lone striker, and it appears he will have the opportunity to do just that against the World Cup semi-finalists.
With Doyle now facing a race against time to be fit for the Republic's Euro 2012 qualifying clash in Macedonia in June, there could hardly be a greater incentive to prove he is one possible solution to a problem his international manager desperately hopes he will not have to address.
Trapattoni has had no qualms about involving the nation's most promising youngsters in his squad, although he has studiously avoided where possible throwing them in at the deep end in tough qualifying games in the belief, borne out of his vast experience, that a bad experience there could have a lasting effect.
But he will send Glasgow-born McCarthy out at the Aviva Stadium under orders to make his presence felt and to demonstrate the talent which led to such a tug of love with Scotland to secure his services.
Trapattoni said: "I don't expect him to perform miracles, but I know his quality, I know what he can do.
"But I have said to him, it is important for him to call for the ball always, it's important to be vocal.
"I have watched him on the pitch and he is a little bit shy. He must get over this shyness."
A good performance from McCarthy would go some of the way towards lifting the gloom - in Ireland, rather than Wolverhampton - which descended when it emerged that Doyle's knee injury was more significant than just a knock.
The 27-year-old has become a fixture in Trapattoni's starting XI, but the Italian was relieved when scans revealed a tear, and that the injury is perhaps less serious than was first thought.
The manager said: "Thank God, it is not bad. It will be up to him to say when he feels he is ready to play again."
Even that news, however, was not good for Wolves, managed by former Republic boss Mick McCarthy, who may be without their £6.5million signing for the rest of the season as they attempt to retain their Barclays Premier League status.