The 30-year-old, who spent last season on loan at Bolton Wanderers, was signed by Steve McClaren for £4.5m from Stoke City just 18 months ago.
Tuncay made just five appearances during his time in Germany without scoring a goal.
The striker only found the net once for the Trotters, in a Carling Cup game against Macclesfield.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Bayern MunichBayern | 22 | 17 | 4 | 1 | 65 | 19 | 46 | 55 |
| 2 | Bayer LeverkusenB. Leverkusen | 22 | 13 | 8 | 1 | 49 | 27 | 22 | 47 |
| 3 | Eintracht FrankfurtFrankfurt | 21 | 11 | 6 | 4 | 46 | 28 | 18 | 39 |
| 4 | RB Leipzig | 22 | 10 | 7 | 5 | 36 | 29 | 7 | 37 |
| 5 | Freiburg | 22 | 11 | 3 | 8 | 29 | 36 | -7 | 36 |
| 6 | Stuttgart | 22 | 10 | 5 | 7 | 40 | 33 | 7 | 35 |
| 7 | Borussia MonchengladbachBorussia M'bach | 22 | 10 | 4 | 8 | 35 | 32 | 3 | 34 |
| 8 | Wolfsburg | 22 | 9 | 6 | 7 | 45 | 36 | 9 | 33 |
| 9 | Mainz 05Mainz | 21 | 9 | 5 | 7 | 33 | 24 | 9 | 32 |
| 10 | Werder Bremen | 21 | 8 | 6 | 7 | 34 | 39 | -5 | 30 |
| 11 | Borussia DortmundDortmund | 22 | 8 | 5 | 9 | 37 | 38 | -1 | 29 |
| 12 | Augsburg | 22 | 7 | 7 | 8 | 24 | 35 | -11 | 28 |
| 13 | Union BerlinUnion Berlin | 22 | 6 | 6 | 10 | 21 | 29 | -8 | 24 |
| 14 | St Pauli | 22 | 6 | 3 | 13 | 18 | 25 | -7 | 21 |
| 15 | Hoffenheim | 21 | 4 | 6 | 11 | 26 | 44 | -18 | 18 |
| 16 | Heidenheim | 21 | 4 | 2 | 15 | 25 | 43 | -18 | 14 |
| 17 | VfL BochumVfL Bochum | 22 | 3 | 5 | 14 | 21 | 46 | -25 | 14 |
| 18 | Holstein Kiel | 21 | 3 | 4 | 14 | 33 | 54 | -21 | 13 |
| > Bundesliga Full Table | |||||||||
