Middlesbrough FC All Time Appearances
| Player | Apps |
|---|---|
| A Price | 1 |
| Aaron Connolly | 21 |
| Aaron Ramsey | 11 |
| Abel Xavier | 27 |
| Adam Clayton | 241 |
| Adam Forshaw | 103 |
| Adam Hammill | 10 |
| Adam Johnson | 117 |
| Adam Reach | 78 |
| Adama Traroe | 71 |
| Aden Flint | 42 |
| Adlene Guedioura | 6 |
| Afonso Alves | 49 |
| Aidan Morris | 20 |
| Ajay Matthews | 2 |
| Alan Comfort | 20 |
| Alan Foggon | 139 |
| Alan McNeill | 3 |
| Alan Miller | 63 |
| Alan Moody | 51 |
| Alan Moore | 135 |
| Alan Murray | 9 |
| Alan Peacock | 239 |
| Alan Ramage | 81 |
| Alan Roberts | 40 |
| Alan Rodgerson | 14 |
| Alan Walsh | 3 |
| Alan Willey | 60 |
| Alan Wright | 2 |
| Albert Adomah | 142 |
| Albert Elkes | 113 |
| Albert Ross | 12 |
| Alen Boksic | 77 |
| Alex Bangura | 18 |
| Alex Baptiste | 1 |
| Alex Gilbert | 22 |
| Alex Linwood | 15 |
| Alex McCrae | 130 |
| Alex Mowett | 31 |
| Alex Nimely-Tchuimeni | 10 |
| Alex Smith | 138 |
| Alf Wood | 28 |
| Allan Johnston | 23 |
| Allan Kernaghan | 267 |
| Alun Armstrong | 32 |
| Alvaro Negredo | 39 |
| Andraz Sporar | 38 |
| Andre Bikey | 37 |
| Andrew Carr | 5 |
| Andrew Davies | 70 |