The 23-year-old forward was on loan with the Trotters twice last season, scoring six goals in 16 league appearances.
According to BBC Radio Wales, Bolton have now secured Mason for the entirety of the 2014-15 season.
He will hope to give the Trotters a boost after they slumped to a 3-0 defeat at Watford on the opening day of the Championship season.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Birmingham CityBirmingham | 9 | 7 | 1 | 1 | 17 | 9 | 8 | 22 |
| 2 | Wrexham | 10 | 6 | 2 | 2 | 18 | 8 | 10 | 20 |
| 3 | Mansfield TownMansfield | 9 | 6 | 2 | 1 | 17 | 11 | 6 | 20 |
| 4 | Lincoln CityLincoln | 9 | 5 | 3 | 1 | 15 | 8 | 7 | 18 |
| 5 | Wycombe WanderersWycombe | 9 | 5 | 2 | 2 | 17 | 13 | 4 | 17 |
| 6 | Stockport CountyStockport | 9 | 4 | 4 | 1 | 13 | 7 | 6 | 16 |
| 7 | Exeter CityExeter | 9 | 5 | 1 | 3 | 10 | 6 | 4 | 16 |
| 8 | Charlton AthleticCharlton | 10 | 5 | 1 | 4 | 10 | 9 | 1 | 16 |
| 9 | Huddersfield TownHuddersfield | 10 | 5 | 0 | 5 | 14 | 11 | 3 | 15 |
| 10 | Blackpool | 10 | 4 | 3 | 3 | 17 | 16 | 1 | 15 |
| 11 | Barnsley | 10 | 4 | 3 | 3 | 15 | 15 | 0 | 15 |
| 12 | Stevenage | 10 | 4 | 2 | 4 | 8 | 7 | 1 | 14 |
| 13 | Bolton WanderersBolton | 9 | 4 | 2 | 3 | 15 | 15 | 0 | 14 |
| 14 | Peterborough UnitedPeterborough | 10 | 4 | 2 | 4 | 16 | 18 | -2 | 14 |
| 15 | Wigan AthleticWigan | 10 | 3 | 4 | 3 | 9 | 5 | 4 | 13 |
| 16 | Reading | 9 | 4 | 1 | 4 | 13 | 14 | -1 | 13 |
| 17 | Rotherham UnitedRotherham | 10 | 3 | 4 | 3 | 9 | 11 | -2 | 13 |
| 18 | Bristol Rovers | 10 | 4 | 1 | 5 | 13 | 16 | -3 | 13 |
| 19 | Leyton Orient | 10 | 2 | 2 | 6 | 10 | 14 | -4 | 8 |
| 20 | Northampton TownNorthampton | 9 | 2 | 2 | 5 | 11 | 17 | -6 | 8 |
| 21 | Crawley TownCrawley | 9 | 2 | 1 | 6 | 5 | 13 | -8 | 7 |
| 22 | Shrewsbury TownShrewsbury | 10 | 1 | 2 | 7 | 8 | 17 | -9 | 5 |
| 23 | Burton Albion | 9 | 0 | 4 | 5 | 10 | 19 | -9 | 4 |
| 24 | Cambridge UnitedCambridge | 9 | 0 | 1 | 8 | 6 | 17 | -11 | 1 |
| > League One Full Table | |||||||||
