Plymouth Argyle make their 10th summer signing by bringing in former loan midfielder Oscar Threlkeld after he was released by Bolton Wanderers.
The 21-year-old made 25 appearance on loan to Argyle from the Wanderers during last season.
He missing out on playing the League Two play-offs for Argyle because of the terms of his loan deal.
But, now his Bolton contract has expired, he has returned to Home Park on an undisclosed-length deal.
Following goalkeeper Vincent Dorel’s new contract, Pilgrims boss Derek Adams now has 18 first-team players under contract for the 2016-17 season, which starts on 6 August.
Find all the latest football transfers on our dedicated page.