| AKPOM | Chuba ..... , Middlesbrough and former PAOK forward (5) |
| DOWNING | Stewart ....... , Middlesbrough and former West Ham and England winger (7) |
| UDEZE | Ifeanyi ..._, 2000-05 Nigeria and 2000-06 PAOK defender; West Brom loanee in 2003 (5) |
| EUELL | Jason ..... , retired Jamaica and England U21 forward whose clubs included Charlton Athletic, Blackpool, Wimbledon, Middlesbrough and Southampton (5) |
| FORSS | Finland, Middlesbrough and 2018-22 Brentford forward (6,5) |
| BATES | Matthew ..... , Hartlepool defender whose former clubs include Middlesbrough and Bradford City (5) |
| EMNES | Marvin ?, former Netherlands youth footballer who played in Britain for Swansea City, Middlesbrough and Blackburn Rovers (5) |
| DEREK | 1987-99 Scotland, 1985-92 Celtic, 1992-97 Middlesbrough and 1997-2002 Aberdeen defender (5,5) |
| WHYTE | 1987-99 Scotland, 1985-92 Celtic, 1992-97 Middlesbrough and 1997-2002 Aberdeen defender (5,5) |
| FESTA | Gianluca ..., Roma, Inter Milan, Middlesbrough and Portsmouth defender (5) |
| STAMP | Phil ...., 1993-2002 Middlesbrough and 2002-05 Hearts midfielder (5) |
| DIENG | Seny ...... Senegal, Middlesbrough and 2018-23 OPR goalkeeper (5) |
| AYALA | Daniel, 2009-11 Liverpool, 2014-20 Middlesbrough and 2020-23 Blackburn defender (5) |
| MARCUS | Finland, Middlesbrough and 2018-22 Brentford forward (6,5) |
| MIDO | Former Egypt, Middlesbrough and Spurs striker who has subsequently managed clubs including Zamalek and Ismaily (4) |
| ALIADIERE | Jeremie ......... , former Lorient, Middlesbrough and Arsenal attacker (9) |
| WOODGATE | Jonathan ........ , former Middlesbrough and England defender (8) |
| ALEN | .... Boksic, Lazio, Juventus, Middlesbrough and Croatia forward (4) |
| MARVIN | 2008-14 Middlesbrough and 2014-17 Swansea attacker (6,5) |
| SCHWARZER | Mark ..., former Australia, Middlesbrough and Fulham goalie (9) |
