The 31-year-old is expected to leave the Keepmoat Stadium for free at the end of the season after the club was relegated to League One.
Leeds boss Neil Warnock is now trying to secure the former Senegal international's services, according to Sky Sports News.
Diouf joined Doncaster at the end of 2011 following two years at Blackburn Rovers.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Leeds UnitedLeeds | 32 | 20 | 9 | 3 | 66 | 19 | 47 | 69 |
| 2 | Sheffield UnitedSheff Utd | 32 | 21 | 6 | 5 | 46 | 23 | 23 | 67 |
| 3 | Burnley | 32 | 17 | 13 | 2 | 39 | 9 | 30 | 64 |
| 4 | Sunderland | 32 | 17 | 11 | 4 | 49 | 28 | 21 | 62 |
| 5 | Blackburn RoversBlackburn | 32 | 14 | 6 | 12 | 37 | 31 | 6 | 48 |
| 6 | West Bromwich AlbionWest Brom | 32 | 11 | 14 | 7 | 41 | 30 | 11 | 47 |
| 7 | Bristol City | 32 | 11 | 12 | 9 | 40 | 36 | 4 | 45 |
| 8 | Sheffield WednesdaySheff Weds | 32 | 12 | 9 | 11 | 45 | 48 | -3 | 45 |
| 9 | Middlesbrough | 31 | 12 | 8 | 11 | 50 | 42 | 8 | 44 |
| 10 | Coventry CityCoventry | 32 | 12 | 8 | 12 | 42 | 40 | 2 | 44 |
| 11 | Norwich CityNorwich | 32 | 11 | 10 | 11 | 50 | 44 | 6 | 43 |
| 12 | Watford | 32 | 12 | 6 | 14 | 42 | 48 | -6 | 42 |
| 13 | Queens Park RangersQPR | 32 | 10 | 11 | 11 | 35 | 41 | -6 | 41 |
| 14 | Millwall | 31 | 10 | 10 | 11 | 31 | 32 | -1 | 40 |
| 15 | Preston North EndPreston | 31 | 9 | 13 | 9 | 34 | 38 | -4 | 40 |
| 16 | Oxford UnitedOxford Utd | 32 | 9 | 11 | 12 | 34 | 45 | -11 | 38 |
| 17 | Swansea CitySwansea | 32 | 10 | 7 | 15 | 33 | 43 | -10 | 37 |
| 18 | Portsmouth | 32 | 8 | 9 | 15 | 39 | 55 | -16 | 33 |
| 19 | Stoke CityStoke | 31 | 7 | 11 | 13 | 28 | 39 | -11 | 32 |
| 20 | Cardiff CityCardiff | 31 | 7 | 10 | 14 | 34 | 53 | -19 | 31 |
| 21 | Derby CountyDerby | 32 | 7 | 8 | 17 | 33 | 42 | -9 | 29 |
| 22 | Hull City | 31 | 7 | 8 | 16 | 31 | 42 | -11 | 29 |
| 23 | Plymouth ArgylePlymouth | 31 | 6 | 10 | 15 | 34 | 64 | -30 | 28 |
| 24 | Luton TownLuton | 31 | 7 | 6 | 18 | 30 | 51 | -21 | 27 |
| > Championship Full Table | |||||||||
