Middlesbrough FC All Time Appearances
| Player | Apps |
|---|---|
| Zack Steffen | 45 |
| Yannick Bolasie | 15 |
| Yanic Wildschut | 15 |
| Yakubu | 104 |
| Willy Falconer | 59 |
| Willo Flood | 16 |
| Willie Whigham | 213 |
| Willie Maddren | 357 |
| Willie Fernie | 67 |
| Williams Kokolo | 2 |
| William Wass | 3 |
| William Scott | 28 |
| William Robertson | 5 |
| William Pease | 174 |
| William Millar | 8 |
| William Forrest | 330 |
| Will Hamilton | 12 |
| Wilf Mannion | 366 |
| Walter Auld | 2 |
| Wally Briggs | 2 |
| Vladimir Kinder | 48 |
| Viv Anderson | 2 |
| Viktor Fischer | 16 |
| Victor Valdes | 28 |
| Uwe Fuchs | 16 |
| Ugo Ehiogu | 151 |
| Uche Ikpeazu | 21 |
| Tyrone ONeil | 1 |
| Tuncay Sanli | 78 |
| Trevor Senior | 15 |
| Trevor Putney | 61 |
| Toyosi Olusanya | 3 |
| Tony Vidmar | 15 |
| Tony Mowbray | 422 |
| Tony McMahon | 137 |
| Tony McAndrew | 357 |
| Tommy Wright | 60 |
| Tommy Smith | 47 |
| Tommy Conway | 10 |
| Tommy Butler | 2 |
| Tommy Brown | 47 |
| Tommy Blenkinsopp | 100 |
| Tomas Mejias | 19 |
| Tomas Kalas | 47 |
| Tom Woodward | 19 |
| Tom Paterson | 1 |
| Tom Johnson | 5 |
| Tom Glover | 21 |
| Tom Craddock | 5 |
| Thomas Griffiths | 94 |