Chapman made his first appearance since returning to The Blades on loan in January against as a 71st minute substitute against Vale.
The winger had the ball in the back of the net twice during his cameo appearance, but was flagged up for offside on both occasions.
Chapman and United’s celebrations owe thanks to Connor Ripley and Oldham Athletic’s performance on Good Friday.
The Latics, despite being reduced to ten men after an hour, beat second-placed Bolton 1-0 at Boundary Park, with Ripley keeping his 17th league clean sheet of the campaign.
Ripley is now just two shutouts short of an Oldham club record – but couldn’t edge closer to that milestone as his side lost 1-0 to Bristol Rovers on Monday.
Callum Cooke provided a fifth assist of his loan spell as Crewe Alexandra drew 2-2 with Notts County.
Cooke’s quick through pass released Chris Dagnall to score his ninth goal in 10 games.
The Boro youngster was also involved in Crewe’s 3-0 defeat at Yeovil on Monday. Cooke had perhaps Crewe’s best chance in the first period with a deflected strike before being replaced at half-time.
Joe Fryer played both of Hartlepool’s Easter fixtures, a 1-1 draw at home against Carlisle followed by a disappointing 2-1 defeat at bottom club Leyton Orient.
Pools now sit a point above the League Two relegation zone with three games remaining.
Robbie Tinkler’s North Ferriby United were relegated from the National League after a 3-1 defeat against Barrow.
Tinkler had scored – his fourth goal in nine games – as United had given themselves slim hope with a 2-1 win against Eastleigh on Good Friday, but the loss against Barrow three days later consigned their fate.
Joao Morelli was introduced from the bench to score in a 2-0 win for FC Levadia.
Morelli was subbed on after 68 minutes against Tulevik, scoring his third goal for the Estonian club 18 minutes later.