Mullin was injured during the North Wales-based club's stateside friendly against Manchester United on 26 July.

The 28-year-old was taken to hospital in the first half with a punctured lung after a reckless challenge by United goalkeeper Nathan Bishop.

He will miss the Red Dragons' first game back in the English Football League (EFL) in 15 seasons at home against MK Dons on Saturday.

"The Paul thing is devastating to the club, but again it's a contact sport and things happen," McElhenney told S4C's Maxine Hughes.

"He's OK, I just texted with him this morning. He's in San Diego and he's going to come up and stay with us for a couple of weeks until he can leave and head back to Wales."

Wrexham AFC was bought by Ryan Reynolds and It's Always Sunny in Philadelphia co-creator Rob McElhenney in 2020.

The club's journey has been documented in a Disney+ documentary, Welcome to Wrexham, which recently received six Emmy nominations.

The club's long-awaited return to the EFL was celebrated with an open top bus parade which saw tens of thousands turn up to celebrate the victory.

"We had that parade in the town and I think the local officials thought there would be about 20,000-25,000 show up and there was 40,000 people so it seemed and felt like the entire town had come out," he said.

"It wasn't to celebrate us, and I don't even know that it was to celebrate the players themselves or the organisation. What I like to believe is that it was people coming out to celebrate themselves and celebrate the community all coming together as one and finally getting what they deserve, which is a win."

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McElhenney, and manager Phil Parkinson, are hopeful that League One could be within Wrexham's grasp.

"It's almost entirely the squad from last year. We've signed very few new players, of which I know they're a welcome addition," he added.

"But this is a lot of the same, most of the same team that won last year so the chemistry is through the roof and Phil [Parkinson] truly believes that we have a chance to get promoted again."