Jelle Vossen scored seven league goals for Boro in the 2014/15 season.
Here are the 13 players, including substitutes, who played in the 2-0 defeat at Wembley Stadium in 2015, and what has happened to them since:
The 40-year-old shot-stopper is still at the club but is out of contract this summer. Konstantopoulos has rarely featured since Boro won promotion to the Premier League in 2016.
Whitehead was drafted in at right-back for the final few games of the 2014/15 campaign. He left Boro for Huddersfield a few weeks later, before retiring in 2018 and taking up a coaching role with the Terriers
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Following Boro's relegation from the Premier League in 2017, Gibson stayed at the club despite interest from elsewhere. The defender left on good terms the following summer but has made just one league appearance for Burnley since.
One of the four players on this list who are still at the club. Ayala struggled with injuries after Boro won promotion to the Premier League but has reestablished himself in the heart of defence.
The 31-year-old left-back is approaching his seven-year anniversary at the club after arriving in the summer of 2012. In that time, Friend has been a regular throughout and become a fans' favourite on Teesside.
Like Ayala, Clayton has dropped out of the side in the last few years but has stuck around to fight for his place. The 30-year-old still has two years left on his contract.
The former Boro skipper joined boyhood club Sunderland in January due to a lack of game time. Leadbitter will hope to win promotion from League One with the Black Cats this weekend.
Adomah left Boro for Aston Villa in 2016. He has remained at Villa Park and is due to play in the Championship play-off final this weekend, after winning back his place under Dean Smith.
Tomlin never quite hit the same heights he reached at Boro after leaving for Bournemouth in 2015. After a spell at Bristol City, the playmaker joined Cardiff and was recently loaned out to Peterborough in League One.
Boro elected not to sign Vossen after his loan spell from Genk. Ater a brief stint at Burnley, the striker, now 30, joined Club Brugge in 2015 and has gone on to make over 100 appearances for the Belgian club.
Like Vossen, Boro didn't sign the striker permanently following his loan spell from Chelsea. Bamford returned to Teesside in 2017 but left for Leeds United last summer, where he's scored nine Championship goals this term.
After leaving Boro in 2016, Kike has racked up 95 appearances for Spanish side Eibar. He has scored three goals in 30 La Liga appearances this season.
After leaving Boro for Birmingham in 2017, Nsue joined Cyprian side APOEL FC. The winger, 29, has made just nine league appearances this campaign.
The popular manager is out of work after leaving Nottingham Forest earlier in the season. He has even been linked with a shock return to Boro following the departure of Tony Pulis.