Waterford man Murphy might be 32 and may only have a year remaining on his contract, but his value to McCarthy’s promotion tilt in the coming season is massive.
His 27 goals had a major influence in Ipswich confounding their low budget by making it to last term’s Championship play-offs.
That’s why interest in the Ireland striker, from the likes of West Bromwich Albion, Middlesbrough and Cardiff City, has been batted away.
Boro have already had one bid — believed to be €4.5m — rejected, while another suitor was given short shrift for insulting McCarthy with a loan offer.
“There has been loads of interest in Daryl,” he said on Saturday, after watching his side thump Shelbourne 6-0 at Tolka Park, in a friendly.
“He had a fantastic last season, but I even had one club ringing up asking if they could loan him. That one was ridiculous and they got a one-word answer from me.
“I actually prefer when there is interest in my players, because it means they’ve played well.
“For Daryl to score 27 goals was fantastic. I don’t want to lose players and I think we proved that last year, when we turned down £3.5m for Tyrone Mings.
“We then sold him a few weeks ago (to Bournemouth, for £8m). That’s a different ball game.
“We did the same with an offer for David McGoldrick, last season. I’m hoping it’s going to be the same with Daryl Murphy — in that any interest will be staved off.”
Meanwhile, McCarthy posted a gloomy outlook on Ireland’s prospects of reaching next year’s European Championships.
For Martin O’Neill’s side to sneak into the play-off spot, they require a run of wins in the final four games, coupled with a capitulation by third-placed Scotland.
“You’ve got to win games,” was the blunt assessment by the former Ireland captain and manager, of the predicament of the current squad.
“I don’t think Ireland will get any favours from other teams; they don’t tend to be giving them out too easily.
“The teams above Ireland — Germany, Poland, Scotland — are all performing well in the group.”