The former Manchester United assistant spent five years at the Riverside – a spell which saw Boro win the 2004 Carling Cup trophy and reach the 2006 UEFA Cup final. The Teessiders also made some terrific signings under McClaren - scroll down and flick through our gallery to see the best of them:
. MIDDLESBROUGH, ENGLAND - APRIL 27: Middlesbrough Manager Steve McClaren celebrates his team's victory with winning goalscorer Massimo Maccarone at the end of the UEFA Cup Semi Final, second leg match between Middlesbrough and Steaua Bucharest at the Riverside Stadium on April 27, 2006 in Middlesbrough, England. (Photo by Alex Livesey/Getty Images)
Former Middlesbrough manager Steve McClaren. Photo: Alex Livesey
. (11th) Chris Riggott
Signed from Derby County for around £2million in 2003, Riggott proved to be a valuable player under McClaren. The centre-back was regularly picked alongside Gareth Southgate during Boro's run to the UEFA Cup final and made over 100 appearances for the club before departing in 2010. Photo: Clive Brunskill
. (10th) Franck Queudrue
The French defender became Boro's first-choice left back after moving to Teesside from Ligue 1 side Lens in 2001. Queudrue also chipped in with a few goals during his five-year stay at the Riverside, netting 12 in total. Photo: Jamie McDonald
. (9th) Massimo Maccarone
He may not have always been first choice, yet the Italian was always a man for the big occasions. Boro paid a substantial fee of around £8million for the frontman in 2002 but Maccarone more than repaid that fee with his two memorable goals against Basel and Steaua Bucharest in the 2005/06 UEFA Cup run. Photo: AFP
. (8th) Yakubu
With Mark Viduka and Jimmy Floyd Hasselbaink already at the club in 2005, Boro's attacking firepower was bolstered further when Yakubu was signed for a then club-record fee. The Nigerian international netted 32 during his two years at the Riverside before moving to Everton for £11.25million. Photo: Matthew Lewis
1. (11th) Chris Riggott
Signed from Derby County for around £2million in 2003, Riggott proved to be a valuable player under McClaren. The centre-back was regularly picked alongside Gareth Southgate during Boro's run to the UEFA Cup final and made over 100 appearances for the club before departing in 2010. Photo: Clive Brunskill
2. (10th) Franck Queudrue
The French defender became Boro's first-choice left back after moving to Teesside from Ligue 1 side Lens in 2001. Queudrue also chipped in with a few goals during his five-year stay at the Riverside, netting 12 in total. Photo: Jamie McDonald
3. (9th) Massimo Maccarone
He may not have always been first choice, yet the Italian was always a man for the big occasions. Boro paid a substantial fee of around £8million for the frontman in 2002 but Maccarone more than repaid that fee with his two memorable goals against Basel and Steaua Bucharest in the 2005/06 UEFA Cup run. Photo: AFP
4. (8th) Yakubu
With Mark Viduka and Jimmy Floyd Hasselbaink already at the club in 2005, Boro's attacking firepower was bolstered further when Yakubu was signed for a then club-record fee. The Nigerian international netted 32 during his two years at the Riverside before moving to Everton for £11.25million. Photo: Matthew Lewis