The career of veteran goalkeeper Liam Reddy is in doubt after he was stood down indefinitely by Central Coast Mariners over recurring behaviour issues.

The 34-year-old will not travel with the squad to play Melbourne City this weekend and his playing days with the club hang in the balance after a flare-up of ongoing problems. Major behavioural concerns were cited that have disrupted the team in recent weeks.

Club sources suggest Reddy's future will be determined by his response with no certainty as to whether he will play again for the club. His attitude was brought into question by the coaching staff which has also resulted in Reddy being removed from training, despite the players' union threatening legal action against the Mariners.

The revelations follow Reddy's explosive comments over the weekend and criticism of his side's performance.