Midfielder Chris Birchall has told BBC Radio Stoke that he would be happy to play for Port Vale free of charge for the remainder of the season.
The 27-year-old, who turned down the offer of a new contract with LA Galaxy, is expected to sign a month-to-month deal with the League Two club.
Birchall played 91 games for Vale before joining Coventry in August 2006.
"Initially when I went in, I said I'd play for nothing because I owe the club a lot," said Birchall.
"[Vale manager] Micky Adams has done a lot for me in my career as well. It's not just Port Vale, it's Micky Adams who has signed me for a couple of clubs.
"He's been very good with me so it's a good relationship that I've got with him. If I can help both of them out, then I'll do it.
"I wouldn't do it for anyone else, even if there was a different manager at Port Vale. It's just the two things that have come together - my relationship with Micky and my desire to see Port Vale do well.
"It's not a long-term thing and I can deal without it for a couple of months, it's no problem for me.
"If I can help the club, that's the main thing."
Birchall, who played for Trinidad and Tobago at the 2006 World Cup, made his senior debut for Vale as a 17-year-old.
Adams, then manager of Coventry, paid £300,000 for his services and later signed Birchall again whilst in charge of Brighton.
Birchall has spent the last three seasons playing alongside David Beckham at LA Galaxy and .
International clearance did not arrive in time for him to feature in the 2-1 win against Gillingham on Saturday, a result which lifted Vale up to eighth in League Two.
Adams is hopeful that Birchall will make a similar impact to Paul Marshall and Chris Shuker, who made their debuts as substitutes against the Gills and inspired Vale to a late victory.
"Marshall and Shuker have brought a little bit of freshness to the squad and hopefully Chris Birchall will do the same next week," said Adams.
"He [Birchall] looks fit enough. He's not played for a while so I think that will be the big problem for him, but he's a naturally fit boy.
"It will be good to see him in the squad. We need a few more extra bodies if we can get them.
"He'll add a bit more competition for places, which hopefully will kickstart the others into playing with a bit more enthusiasm."