Newnes, who was delisted by Carlton at the end of last year, has been named for the Dolphins to face the ladder-leading Gold Coast Suns on Saturday for what will be his first VFL appearance since last year with the Blues.
The 30-year-old had signed with Greensborough early into this year, however his stint with the Northern Football League club was short-lived. Newnes is now set to play his first game with Frankston as they look to add to their three wins for the season.
His first outing for the Dolphins will be a tough task, with a trip to Carrara set to see the 207-time AFL gamer go up against the competition's top side on their home deck.
Newnes brings with him 11 years of experience in the top flight, having spent eight years with the Saints after being drafted in 2011 before making the switch to Princes Park. There he would play 52 games in three years before being delisted.
Among Newnes' new teammates will be former Swan Ryley Stoddart, who has been among the competition's best performers throughout the course of this season. The pair will be familiar to one another, having both played with Carlton's reserves through the 2021 season.
The Dolphins are searching for their first win since May, having lost their past five matches to AFL-affiliated sides. That run is expected to continue against the Suns this weekend, with the Queensland club sitting atop the ladder with 11 wins and two defeats for the year.