Walton has made 93 career appearances for seven clubs
Crewe have signed Plymouth midfielder Simon Walton on a season-long loan.
He joined Argyle for a potential club record £750,000 last summer from QPR, for whom he played five times, but only made 14 appearances for the Greens.
Walton, 21, finished last season on loan at Blackpool, where he played just once from the bench.
Charlton paid £500,000 for Walton from Leeds in 2006, but he failed to make an appearance for them in a year and had loan spells at Ipswich and Cardiff.
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