It's understood that representatives of two clubs will scout A-League matches in the first half of the coming season with Heffernan a prime target. He has two years left on his contract at Bluetongue.

The highly rated former Nurnberg loan signing (2006/7) was called up to the Socceroo squad for the friendly against Argentina in Melbourne last September.

And Heffernan was to be part of Pim Verbeek's Socceroo train-on squad earlier this year before a devastating broken leg late in 2007 put his career on hold.

The free-scoring defender snapped his left tibia during the Mariners' 5-4 loss to Sydney FC days before last Christmas.

The Mariner is working hard to get back to full fitness ahead of the A-League season opener on August 15.