The Reds signed attacker Kaide Gordon from Derby County, where Rooney is manager, in February in a £3million deal.
Gordon had impressed for the Rams’ junior sides, scoring three goals in eight appearances for their Under 18s side.
That saw him called up to the senior side by boss Rooney, who took over as manager at Pride Park last November, with Gordon making his Championship debut against Birmingham City.
Though he would only be on the bench for his remaining games at Derby, Gordon’s past performances were enough to see him snapped up by Liverpool.
As negotiations over the transfer were still taking place, Rooney hailed the move and Gordon’s potential.
“Kaide is a fantastic player and he has got a lot of potential,” said Rooney.
“He has come through the academy. He is 16, he has got a lot of development to do and he is definitely at the right place to do that.”
Rooney went on to add: “For his development I would have liked him to stay. But I understand once the champions of England come in and want to sign you, it is difficult to turn it down.”
Gordon has gone on to prove Rooney’s analysis right, making a lightning-fast start to life on Merseyside.
The 16-year-old has scored six goals in the last four games he has played for Liverpool in the Under 18s Premier League, as well as notching three assists since he joined the club.
Those impressive performances saw him called up to the Under 23s, making his Premier League 2 debut in a 2-0 win against Leicester on Monday.
Gordon was introduced from the bench after 70 minutes and capped his debut with a goal late on to help the Reds secure seventh place in Premier League 2’s Division One.