Adi Yussuf joined Reds in August 2016 on loan from Mansfield Town until January 22, 2017.
He scored five goals in 30 League and Cup appearances for the Stags last season, having signed for the club from non-league Oxford City, where he had a prolific goalscoring in Conference North during the 2014-15 campaign.
Adi has also played for Tamworth, Burton Albion, Harrogate Town and Gainsborough Trinity having started his career at Leicester City.
He made his debut for the club as a second-half substitute against Wycombe on the opening day of the 2016-17 campaign.
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