The Stoke City winger, who joined the Tykes on New Year's Day, will now remain at Oakwell until April 3.
He will make his third Championship start in tonight's home clash with Blackburn Rovers.
USA international Shea joined Stoke in a £2.5m deal from Major League Soccer side FC Dallas in January 2013.
He has made just five first-team appearances for the Potters.
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 | |||||||||
