
Kasey Bos in action for Melbourne Victory during the 24/25 campaign. Photo: Marcus Robertson / Round Ball Australia.
Kasey Bos appears to be gaining European interest as one A-League club are making their intentions known early in the off-season, in this edition of Round Ball Australia’s Rumour Mill.
Kasey Bos seems likely to make the move from Melborune Victory to Bundesliga side 1. FSV Mainz 05, whose sixth placed finish will see them compete in the UEFA Conference League play offs next season. (ESPN – Joey Lynch)
Fellow Melbourne Victory star Daniel Arzani is currently weighing up his own future at the club, with reports of Scottish club Hearts circling the winger. (News Corp – Marco Monteverde). Brighton & Hove Albion owner Tony Bloom has invested in both clubs.
Perth Glory have signed Central Coast Mariners Championship-winning centre back Brian Kaltak to a multi-year contract. (Perth Glory)
Big Brian's on board!
— Perth Glory FC (@PerthGloryFC) June 6, 2025
Serial winner Brian Kaltak has signed a multi-year deal with the club – get all the details here: https://t.co/gJtE5CAwBo
Welcome to Glory, Brian!@aleaguemen #ONEGlory pic.twitter.com/jI2htKFgjO
He will join experienced goalkeeper Mark Birighitti, who has signed to the Glory on a two-year deal, with the West Australian side showing massive intent already in the transfer market. (Perth Glory)
It is understood that Hibernian will not make a move for current Auckland FC goalkeeper Alex Paulsen, who will remain contracted to parent club AFC Bournemouth. (Hibs Observer – Patrick McPartlin)
Portsmouth are looking to deepen their Australian links by further exploring the Australian player market after success with Jacob Farrell and Kusini Yengi. (The News (Portsmouth) – Jordan Cross)
Kusini Yengi has signed a pre-contract with Scottish side Aberdeen, joining fellow Australians Nicolas Milanovic and Nicholas Suman. (Aberdeen FC)
Melbourne City could be set to keep Marco Tilio after reports that parent club Celtic are keen to part ways with the star attacker. (News Corp – Marco Monteverde)

Josh Nisbet has made the switch to the Netherlands, joining Roda JC on a 2+1 contract after leaving Ross County following their relegation to the Scottish Championship. (Roda JC Kerkrade)
Melbourne City have confirmed the departure of veteran midfielder Steven Ugarkovic, who will make the move to Western Sydney Wanderers this off season. (News Corp – Marco Monteverde)
Portsmouth have soured on Nectar Triatis, believing he may not meet the required standard for the EFL Championship; remaining with Hibernian appears the most likely scenario for the midfielder. (The News (Portsmouth) – Jordan Cross)
It is believed that Mat Ryan is not a priority signing for RC Lens this off season, with the Socceroos captain leaving the door open for a move elsewhere. (Foot Mercato (in French) – Sebastien Denis)
Sydney FC goalkeeper Andrew Redmayne is all set to join the Central Coasts Mariners, but concerns over the Gosford club’s transfer activity has stalled the announcement; club officials have stated there is no freeze on transfer activity as rumours of new investors looms. (News Corp – Marco Monteverde)
Following interest from clubs in several European leagues, Australian striker Anthony Carter could be headed to Portuguese first division club Santa Clara, who have qualified for the Conference League next season. (Record (in Portuguese) – André Martins)
Garang Kuol could be on the chopping block as Newcastle FC look to budget for some spending to prepare for Champions League football next season. (The Athletic – Chris Waugh)