The Blades finished the league season eight unbeaten and in seventh position in Sky Bet League One after a final day victory over Coventry City.
Despite trailing at the final whistle, Ryan Flynn celebrated his new contract with a goal and substitute Ben Davies netted United's final goal of the season.
Conor Coady, in his final game before his loan spell expires, claimed assists in both goal.
Clough continued with the policy of naming his strongest possible team, Collins returned from injury to take his place in the heart of the defence, replacing Kennedy.
On his 50th appearance for the Blades, Coady produced the first meaningful chance of the game and although his 25-yard effort was on target, goalkeeper Murphy collected comfortably. The exchanges early on had a distinct feel, although Brayford was looking to get forward at every opportunity.
Coady's appeals for a penalty following a challenge by Willis were waved away and Coventry's first chance arrived on the half hour after a Collins pass failed to reach Murphy but Doyle blocked Wilson's shot.
Twice, in the space of a minute, skipper Doyle went close to scoring against his former club. He was unmarked as he headed Baxter's cross at Murphy and the visiting goalkeeper pushed away a long-range shot soon after.
Fleck then had a long range shot saved by Howard before the visitors took the lead on 39 minutes. Fleck held off Coady to thread a pass through for DELFOUNESO to outmuscle Freeman and slot under the Blades goalkeeper.
Before the interval there was a half-chance for both sides but neither Flynn nor Wilson were able to influence the scorers.
Porter was introduced at the start of the second half, replacing Scougall, who needed treatment for a knock in the first half, but the first chance after the break was the result of Brayford's marauding run, although Murphy emerged from his line to save with his feet.
United had to wait 62 minutes before levelling, but it was a good move which opened up the visitors. FLYNN's turn beat Fleck and after exchanging passes with Coady, the Scotsman cut in and beat Murphy with a low effort.
Clough replaced Baxter with Davies and it was to prove instrumental with United's next significant attack. On 73 minutes Coady powered through a challenge with Webster and picked his moment ahead of laying off to an unmarked DAVIES, who delicately slotted into the corner of the net.
Collins was United's first booking on 76 minutes, for a foul on Wilson, and the Blades defender headed over a cross from Davies as the Blades looked for a third. Doyle tried his luck from 40 yards soon after and Murphy looked worried but the effort was off target.
Hill replaced Freeman in the closing stages and despite the game being stretched, as Coventry searched for an equaliser, there was little to report before the final whistle, apart from an air of optimism for the 2014-15 campaign.
Blades: Howard, Brayford, Maguire, Flynn, Doyle, Baxter (Davies 65), Collins, Coady, Scougall (Porter 45), Murphy, Freeman (Hill 87).
Unused: McGinn, Paynter, Long, Dimaio.
Coventry: Murphy, Christie, Webster, Thomas (Baker 77), Fleck, Delfouneso, Prutton (Eccleston 84), Willis, Wilson, Clarke, Marshall.
Unused: Adams, McGeouch, Burgh, Seaborne, Finch.