Karanka, who is now in charge of Birmingham, provided plenty of great memories for Boro fans during his time at the club – but what has happened to the squad which reached the Premier League under him?
Scroll down and flick through the pages to see the players who made five or more appearances for Boro during the 2015/16 campaign and where they are now:
1. Dimi Konstantopoulos
Now 41, the Greek shot stopper signed for Northern League club Thornaby FC earlier this year and is looking to go into coaching. Photo: Nigel Roddis
2. Tomas Mejias
After returning to Boro last year, Mejias joined Romanian side FC Dinamo on loan in the summer. Photo: NIGEL RODDIS
3. Emilio Nsue
After a couple of years at Birmingham, the 30-year-old has moved to Cyprus and is playing for top-flight side APOEL Nicosia. Photo: Jan Kruger
4. Tomas Kalas
The Czech defender, 27, signed permanently for Bristol City last summer and has been made captain at Ashton Gate. Photo: Chris Brunskill