ADELAIDE United has rejected a bid for championship defender Dylan McGowan.

Adelaide chairman Greg Griffin confirmed a Thai club had made an offer for the centre back just three months after McGowan had signed a one-year contract extension.

McGowan would have become the sixth key player to leave the club since the Reds claimed the Premier’s Plate and championship on May 1.

The exodus started with Craig Goodwin (Sparta Rotterdam) followed by Bruce Kamau (Melbourne City), Pablo Sanchez (Llagostera), Stefan Mauk (NEC) and Bruce Djite (Suwon FC).

McGowan does not have a buyout clause in his contract meaning Adelaide could ask for reasonable transfer compensation for the defender.

But Griffin is adamant McGowan is staying put.

“We’re not interested,’’ Griffin said.

“We don’t care what the price is but he’s not going anywhere.”

Griffin says he expects McGowan to remain for the duration of his contract extension which will see the stopper also take part in Adelaide’s 2017 AFC Champions League group stage campaign.

With McGowan all but certain to stay Griffin claimed Adelaide was extremely close to unveiling experienced new Australian signings and an import for the new season.

And with Reds Italian defender Iacopo La Rocca destined to earn Australian player status by the end of the year Adelaide can again delve into the transfer market in January to bolster its import stocks.

Argentine playmaker Marcelo Carrusca is also tipped to become an non-visa player by the middle of next year meaning Adelaide will have another foreign spot available if it chooses to extend the attacking midfielder’s contract.