The 24-year-old has been at the Championship club for the past three seasons after joining from Watford.
According to The Guardian, Sunderland have made an offer in the region of £2.5m for the player, but his club are thought to want closer to £3m.
It is believed that the Black Cats will face competition from West Bromwich Albion for Buckley's signature.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Sheffield UnitedSheff Utd | 27 | 17 | 6 | 4 | 38 | 17 | 21 | 55 |
| 2 | Leeds UnitedLeeds | 26 | 15 | 8 | 3 | 48 | 19 | 29 | 53 |
| 3 | Burnley | 27 | 14 | 11 | 2 | 31 | 9 | 22 | 53 |
| 4 | Sunderland | 27 | 14 | 9 | 4 | 39 | 22 | 17 | 51 |
| 5 | Blackburn RoversBlackburn | 27 | 12 | 6 | 9 | 31 | 24 | 7 | 42 |
| 6 | West Bromwich AlbionWest Brom | 27 | 9 | 14 | 4 | 33 | 22 | 11 | 41 |
| 7 | Middlesbrough | 27 | 11 | 8 | 8 | 44 | 34 | 10 | 41 |
| 8 | Watford | 27 | 12 | 5 | 10 | 38 | 37 | 1 | 41 |
| 9 | Bristol City | 27 | 9 | 10 | 8 | 33 | 31 | 2 | 37 |
| 10 | Sheffield WednesdaySheff Weds | 26 | 10 | 7 | 9 | 38 | 40 | -2 | 37 |
| 11 | Norwich CityNorwich | 27 | 9 | 9 | 9 | 43 | 39 | 4 | 36 |
| 12 | Queens Park RangersQPR | 27 | 8 | 11 | 8 | 30 | 34 | -4 | 35 |
| 13 | Swansea CitySwansea | 27 | 9 | 7 | 11 | 30 | 33 | -3 | 34 |
| 14 | Coventry CityCoventry | 27 | 8 | 8 | 11 | 35 | 37 | -2 | 32 |
| 15 | Oxford UnitedOxford Utd | 27 | 8 | 8 | 11 | 30 | 41 | -11 | 32 |
| 16 | Preston North EndPreston | 27 | 6 | 13 | 8 | 28 | 34 | -6 | 31 |
| 17 | Millwall | 26 | 7 | 9 | 10 | 24 | 24 | 0 | 30 |
| 18 | Stoke CityStoke | 27 | 6 | 10 | 11 | 25 | 33 | -8 | 28 |
| 19 | Derby CountyDerby | 27 | 7 | 6 | 14 | 31 | 37 | -6 | 27 |
| 20 | Cardiff CityCardiff | 27 | 6 | 9 | 12 | 29 | 41 | -12 | 27 |
| 21 | Hull City | 27 | 6 | 8 | 13 | 26 | 36 | -10 | 26 |
| 22 | Portsmouth | 26 | 6 | 8 | 12 | 32 | 45 | -13 | 26 |
| 23 | Luton TownLuton | 27 | 7 | 5 | 15 | 27 | 44 | -17 | 26 |
| 24 | Plymouth ArgylePlymouth | 27 | 4 | 9 | 14 | 25 | 55 | -30 | 21 |
| > Championship Full Table | |||||||||
