The 18-year-old goalkeeper, who had previous trials with Manchester United and Chelsea, joined the League One outfit during the summer.
However, the American failed to make an appearance for the senior side under Darren Ferguson's management, which has resulted in his release.
Horton is now free to join another club.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Birmingham CityBirmingham | 27 | 19 | 6 | 2 | 46 | 19 | 27 | 63 |
| 2 | Wycombe WanderersWycombe | 29 | 17 | 8 | 4 | 55 | 30 | 25 | 59 |
| 3 | Wrexham | 29 | 16 | 7 | 6 | 43 | 25 | 18 | 55 |
| 4 | Stockport CountyStockport | 29 | 14 | 8 | 7 | 44 | 28 | 16 | 50 |
| 5 | Huddersfield TownHuddersfield | 28 | 14 | 6 | 8 | 41 | 26 | 15 | 48 |
| 6 | Leyton Orient | 28 | 13 | 5 | 10 | 40 | 25 | 15 | 44 |
| 7 | Charlton AthleticCharlton | 28 | 12 | 8 | 8 | 36 | 28 | 8 | 44 |
| 8 | Reading | 28 | 13 | 5 | 10 | 43 | 41 | 2 | 44 |
| 9 | Bolton WanderersBolton | 29 | 13 | 5 | 11 | 43 | 43 | 0 | 44 |
| 10 | Barnsley | 29 | 12 | 7 | 10 | 41 | 39 | 2 | 43 |
| 11 | Stevenage | 27 | 11 | 7 | 9 | 27 | 25 | 2 | 40 |
| 12 | Lincoln CityLincoln | 29 | 10 | 9 | 10 | 35 | 34 | 1 | 39 |
| 13 | Blackpool | 28 | 9 | 11 | 8 | 41 | 40 | 1 | 38 |
| 14 | Mansfield TownMansfield | 27 | 11 | 4 | 12 | 35 | 34 | 1 | 37 |
| 15 | Rotherham UnitedRotherham | 28 | 10 | 7 | 11 | 33 | 33 | 0 | 37 |
| 16 | Wigan AthleticWigan | 28 | 9 | 7 | 12 | 27 | 28 | -1 | 34 |
| 17 | Exeter CityExeter | 29 | 9 | 5 | 15 | 33 | 46 | -13 | 32 |
| 18 | Bristol Rovers | 28 | 9 | 4 | 15 | 28 | 44 | -16 | 31 |
| 19 | Peterborough UnitedPeterborough | 29 | 8 | 6 | 15 | 45 | 55 | -10 | 30 |
| 20 | Northampton TownNorthampton | 29 | 7 | 9 | 13 | 28 | 45 | -17 | 30 |
| 21 | Burton Albion | 29 | 5 | 10 | 14 | 30 | 44 | -14 | 25 |
| 22 | Crawley TownCrawley | 27 | 6 | 6 | 15 | 27 | 48 | -21 | 24 |
| 23 | Shrewsbury TownShrewsbury | 28 | 6 | 5 | 17 | 28 | 48 | -20 | 23 |
| 24 | Cambridge UnitedCambridge | 28 | 5 | 7 | 16 | 29 | 50 | -21 | 22 |
| > League One Full Table | |||||||||
