'The beard' returned to Bramall Lane in January 2015 on a permanent basis after United agreed to pay Cardiff City an undisclosed fee for the versatile defender, who became a cult hero at Bramall Lane whilst on-loan in the 2013/14 campaign.
John, singed a three-and-a-half year contract with the Blades and made his 'second' debut in the 2-0 victory over Swindon Town on 31st January.
He made 23 appearances after joining in January 2015, scoring once, before injury prematurely ended his season during the first-half of the first-leg clash with Swindon Town.
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