A successful trial with Blackpool saw Jacob Mellis offered a one-year contract, with the option of a second season.
The midfielder left Barnsley following their relegation to League One, having been an ever-present last season.
Once signed by Chelsea for £1m, Mellis enjoyed loan spells with Southampton and Barnsley, before he joined The Tykes permanently.
The Nottingham-born midfielder spent two further seasons at Oakwell, before leaving for Bloomfield Road in July 2014.
Mellis made his Blackpool debut against Nottingham Forest in August 2014.
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