Jong toured Collingwood’s training base, the Holden Centre, earlier this season, as he weighed up his future after struggling for regular senior appearances since being drafted with pick No.9 in the 2012 rookie draft.
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However, the Suns have now emerged as the front runners to sign the 23-year-old, according to the Herald Sun.
The Suns tried to lure Jong north at the end of last season and have considerable bargaining tools at their disposal, with six draft picks inside the top 30.
Jong is seeking greater first team football, after managing just 39 AFL games in five seasons at Whitten Oval.