Sass, 19, has impressed as a trialist during pre-season, taking part in multiple friendlies including last Saturday’s 4-0 win over Longridge Town.
He has previously been with Egerton Football Club and Macclesfield Town.
He said: “I’m happy to have signed for Stalybridge.
“I’m ready for a new challenge at a great club and can’t wait for the season to start.”
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