"Mladen Petric has been released on the fact that unfortunately, for whatever reason, he never recovered from his injury that he picked up, so that was another one who everybody seems to forget about who sadly wasn't able to make an impact for us," boss Sam Allardyce said on the situation.
Petric is now heading to Panathinaikos on an 18-month contract and is looking forward to the challenge.
"I had some other offers but my wife has wanted to move to Greece for a while now, so I said yes," the former Fulham and Hamburg player told 24sata.
"I believe I will not have any problems with adaptation, I know a lot of the lads. They all told me great things about this club."
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