Current Middlesbrough players edit
As of 10 August 2008. Only includes those players on professional contracts. Debut is defined as the date the player first made a competitive appearance.
| No. | Nationality | Player | Age | Position | Signed from | Fee (£) | Debut | End of contract | Appearances | Goals |
|---|---|---|---|---|---|---|---|---|---|---|
| 3 |  England |
Andrew Taylor | 37 | Defender | Academy | 0 | January 14, 2006 | 2011 | 83 | 0 |
| 4 | England |
Gary O'Neil | 40 | Midfielder | Portsmouth | 5,000,000 | September 15, 2007 | 2010 | 29 | 0 |
| 5 | England |
Chris Riggott | 43 | Defender | Derby County | 2,000,000 | February 8, 2003 | 2010 | 121 | 7 |
| 6 |  Austria |
Emanuel Pogatetz | 41 | Defender | Bayer Leverkusen | 1,800,000 | August 25, 2005 | 2010 | 112 | 3 |
| 8 |  France |
Didier Digard | 37 | Midfielder | Paris Saint Germain | 4,000,000 | N/A | 2012 | 0 | 0 |
| 9 |  Egypt |
Ahmed Mido | 41 | Forward | Tottenham Hotspur | 6,000,000 | August 18, 2007 | 2011 | 17 | 2 |
| 10 | France |
Jérémie Aliadière | 41 | Forward | Arsenal | 2,000,000 | August 11, 2007 | 2011 | 31 | 5 |
| 11 |  Netherlands |
Marvin Emnes | 35 | Forward | Sparta Rotterdam | 3,200,000 | N/A | 2012 | 0 | 0 |
| 12 |  Brazil |
Afonso Alves | 43 | Forward | Heerenveen | 12,700,000 | February 9, 2008 | 2012 | 14 | 6 |
| 14 |  Germany |
Robert Huth | 39 | Defender | Chelsea | 6,000,000 | September 20, 2006 | 2011 | 30 | 2 |
| 15 | Egypt |
Mohamed Shawky | 42 | Midfielder | Al-Ahly | 650,000 | September 26, 2007 | 2010 | 6 | 0 |
| 17 |  Turkey |
Tuncay Şanlı | 42 | Forward | Fenerbahçe | 0 | August 11, 2007 | 2011 | 38 | 8 |
| 19 | England |
Stewart Downing | 39 | Midfielder | Academy | 0 | April 24, 2002 | 2013 | 191 | 20 |
| 20 |  Argentina |
Julio Arca | 43 | Midfielder | Sunderland | 1,750,000 | August 19, 2006 | 2011 | 57 | 5 |
| 21 | England |
Ross Turnbull | 39 | Goalkeeper | Academy | 0 | May 3, 2006 | 2009 | 6 | 0 |
| 22 |  Australia |
Brad Jones | 42 | Goalkeeper | Bayswater City | 0 | January 7, 2004 | 2009 | 30 | 0 |
| 26 | England |
Matthew Bates | 37 | Defender | Academy | 0 | December 6, 2004 | 2009 | 32 | 0 |
| 28 | England |
Adam Johnson | 36 | Midfielder | Academy | 0 | March 17, 2005 | 2010 | 57 | 2 |
| 29 | England |
Tony McMahon | 38 | Defender | Academy | 0 | October 3, 2004 | 2009 | 17 | 0 |
| 31 | England |
David Wheater | 37 | Defender | Academy | 0 | March 15, 2005 | 2011 | 49 | 5 |
| 32 | England |
Jason Steele | 33 | Goalkeeper | Academy | 0 | N/A | 2009 | 0 | 0 |
| 35 | England |
Graeme Owens | 35 | Goalkeeper | Academy | 0 | September 26, 2007 | 2009 | 1 | 0 |
| 36 | England |
John Johnson | 36 | Midfielder | Academy | 0 | N/A | 2009 | 0 | 0 |
| 38 | England |
Seb Hines | 35 | Defender | Academy | 0 | January 16, 2007 | 2009 | 5 | 1 |
| 39 |  Wales |
Rhys Williams | 35 | Defender | Academy | 0 | N/A | 2009 | 0 | 0 |
| 40 | England |
Jonathan Grounds | 36 | Defender | Academy | 0 | January 12, 2008 | 2010 | 7 | 0 |
| 41 | England |
Josh Walker | 35 | Midfielder | Academy | 0 | May 7, 2006 | 2009 | 1 | 0 |
| 42 | England |
Tom Craddock | 37 | Forward | Academy | 0 | May 7, 2006 | 2009 | 5 | 0 |
| England |
Joe Bennett | Defender | Academy | 0 | N/A | 2010 | 0 | 0 | ||
| England |
Jonathan Franks | 34 | Forward | Academy | 0 | N/A | 2009 | 0 | 0 | |
| England |
Nathan Porritt | 34 | Forward | Academy | 0 | N/A | 2010 | 0 | 0 | |
| England |
Richard Smallwood | 33 | Midfielder | Academy | 0 | N/A | 2011 | 0 | 0 |