Middlesbrough FC Heaviest Defeats
| 06-11-54 | Blackburn Rovers | 29189 | Division Two | Away | 0 | 9 |
| 19-04-35 | Arsenal | 45719 | Division One | Away | 0 | 8 |
| 25-10-30 | Leeds United | 18116 | Division One | Away | 0 | 7 |
| 31-01-31 | Aston Villa | 15947 | Division One | Away | 1 | 8 |
| 01-01-30 | Blackburn Rovers | 24370 | Division One | Away | 0 | 7 |
| 12-09-53 | Charlton Athletic | 23790 | Division One | Away | 1 | 8 |
| 26-03-48 | Arsenal | 57557 | Division One | Away | 0 | 7 |
| 14-01-06 | Arsenal | 38186 | Premier League | Away | 0 | 7 |
| 08-09-45 | Newcastle United | 16419 | Football League North | Home | 0 | 6 |
| 25-12-52 | Tottenham Hotspur | 36102 | Division One | Away | 1 | 7 |
| 29-12-51 | Burnley | 26057 | Division One | Away | 1 | 7 |
| 19-01-52 | Fulham | 28941 | Division One | Away | 0 | 6 |
| 31-03-51 | Derby County | 16788 | Division One | Away | 0 | 6 |
| 25-12-31 | Aston Villa | 33774 | Division One | Away | 1 | 7 |
| 07-03-36 | Manchester City | 20094 | Division One | Away | 0 | 6 |
| 30-09-33 | Arsenal | 28293 | Division One | Away | 0 | 6 |
| 28-08-65 | Huddersfield Town | 14772 | Division Two | Away | 0 | 6 |
| 11-04-66 | Bolton Wanderers | 11948 | Division Two | Away | 0 | 6 |
| 03-11-62 | Southampton | 14956 | Division Two | Away | 0 | 6 |
| 25-08-62 | Huddersfield Town | 18470 | Division Two | Home | 0 | 5 |
| 29-08-62 | Newcastle United | 41550 | Division Two | Away | 1 | 6 |
| 15-01-65 | Cardiff City | 9490 | Division Two | Away | 1 | 6 |
| 13-11-65 | Derby County | 12019 | Division Two | Away | 0 | 5 |
| 19-11-60 | Luton Town | 12579 | Division Two | Away | 1 | 6 |
| 31-10-59 | Leyton Orient | 15600 | Division Two | Away | 0 | 5 |
| 02-11-57 | Bristol Rovers | 20390 | Division Two | Away | 0 | 5 |
| 26-11-55 | Bristol Rovers | 23716 | Division Two | Away | 2 | 7 |
| 17-12-55 | Notts County | 9693 | Division Two | Away | 0 | 5 |
| 18-03-78 | Leeds United | 25158 | Division One | Away | 0 | 5 |
| 23-01-24 | Chelsea | 37754 | League Cup | Away | 1 | 6 |
| 26-09-67 | Birmingham City | 28885 | Division Two | Away | 1 | 6 |
| 30-04-32 | Arsenal | 30714 | Division One | Away | 0 | 5 |
| 16-09-31 | Liverpool | 20854 | Division One | Away | 2 | 7 |
| 04-09-48 | Preston North End | 34468 | Division One | Away | 1 | 6 |
| 16-02-52 | Chelsea | 37805 | Division One | Away | 0 | 5 |
| 16-01-54 | Burnley | 23481 | Division One | Away | 0 | 5 |
| 27-08-24 | Stoke City | 17408 | League Cup | Home | 0 | 5 |
| 01-09-54 | Ipswich Town | 19830 | Division Two | Away | 1 | 6 |
| 14-04-48 | Portsmouth | 23890 | Division One | Away | 1 | 6 |
| 08-03-39 | Wolverhampton Wanderers | 20938 | Division One | Away | 1 | 6 |
| 25-12-36 | Leeds United | 30647 | Division One | Away | 0 | 5 |
| 16-01-37 | Wolverhampton Wanderers | 38495 | FA Cup | Away | 1 | 6 |
| 19-09-09 | West Bromwich Albion | 22725 | Championship | Home | 0 | 5 |
| 18-10-08 | Chelsea | 29221 | Premier League | Home | 0 | 5 |
| 17-02-99 | Everton | 31606 | Premier League | Away | 0 | 5 |
| 24-04-99 | Arsenal | 34630 | Premier League | Home | 1 | 6 |
| 04-03-98 | Queens Park Rangers | 11580 | Division One | Away | 0 | 5 |
| 04-02-96 | Chelsea | 21060 | Premier League | Away | 0 | 5 |
| 05-03-83 | Queens Park Rangers | 9596 | Division Two | Away | 1 | 6 |
| 27-11-82 | Blackburn Rovers | 10821 | Division Two | Home | 1 | 5 |