Boro's loanees were involved in drama at both ends of the table as they signed off the season with their loan clubs.
Sam Stubbs played as Notts County endured the pain of relegation from the EFL for the first time in their 157-year history.
The Magpies held onto faint survival hopes heading into the final day, needing to earn a win on their travels at Swindon Town and hoping for a favour from another Boro loanee - requiring Macclesfield Town to lose at home to Hayden Coulson's 21st-placed Cambridge United.
And for a ten-minute period in the second half, it seemed as though the stars were aligning for Stubbs and his teammates. Kane Hemmings had put County in front from the penalty spot, while Coulson and co led at the Moss Rose through former Macclesfield trainee Paul Lewis.
But it wouldn't last, Elliott Durrell equalising for The Silkmen with 66 played and County succumbing to a trio of second-half Swindon goals. A sad story for the historic Nottingham club, who began the season as one of the bookies' favourites for promotion, and Stubbs who had impressed at the back since his January arrival.
As for the other club relegated from League Two, Alex Pattison made what could prove to be his swansong with Yeovil. The Glovers were already consigned to the drop going into the final day, playing out with a 0-0 draw with Carlisle United that put paid to the visitors' slim Play-Off ambitions. Pattison is set to leave Boro when his contract expires this summer.
From despair to delight in League Two, as Ste Walker celebrated promotion to the third tier with MK Dons. Walker was not named in Dons' matchday squad as they hosted Mansfield, locked on points at the top end of the table and needing victory to leapfrog their opponents into the automatic promotion spots. That's exactly what happened at Stadium MK, David Wheeler heading home from a corner in the first two minutes as The Dons held on to return to League One at the first time of asking.
Marvin Johnson was another adding promotion to his CV as Sheffield United secured second spot but were pipped to the Championship title by Norwich City. Johnson's last playing time for The Blades, who drew 2-2 with Stoke City on Sunday, was at the end of March.
Luke Armstrong started in his final outing for Accrington Stanley, who themselves had nought but pride to play for but still had a big say in the final League One standings. Their 1-1 draw with Portsmouth means Pompey miss out on third spot on goal difference, and face a repeat of their Checkatrade Trophy final against Sunderland in the Play-Offs.
Martin Braithwaite scored his fourth league goal for Leganes and provided two assists as they beat Sevilla away from home in La Liga.