Walker,
who can play at either centre-half or right-back, was released by SkyBet League
Two side Mansfield Town last summer.
He
enjoyed a couple seasons with the Stags' under-18 side and was a key member of their
EFL Youth Alliance title-winning side and chipped in with few goals over the
course of the campaign.
The
22-year-old went on to represent Mansfield`s second string and also had loan
spells with NPL Division One West side Leek Town and NPL Premier Division
outfit Grantham Town.
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