The 29-year-old was stretchered off the pitch during the first half of Boro's pre-season friendly away to York City on Saturday.
Baptiste came off second best when he challenged for the ball with an opponent.
The club has yet to confirm the extent of the injury.
Baptiste joined Middlesbrough from Blackburn Rovers at the start of the month.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Sheffield UnitedSheff Utd | 37 | 24 | 7 | 6 | 52 | 28 | 24 | 77 |
| 2 | Leeds UnitedLeeds | 36 | 22 | 10 | 4 | 72 | 23 | 49 | 76 |
| 3 | Burnley | 37 | 20 | 15 | 2 | 50 | 11 | 39 | 75 |
| 4 | Sunderland | 37 | 19 | 12 | 6 | 55 | 34 | 21 | 69 |
| 5 | West Bromwich AlbionWest Brom | 37 | 13 | 17 | 7 | 47 | 33 | 14 | 56 |
| 6 | Coventry CityCoventry | 37 | 16 | 8 | 13 | 52 | 48 | 4 | 56 |
| 7 | Bristol City | 37 | 13 | 15 | 9 | 47 | 40 | 7 | 54 |
| 8 | Middlesbrough | 37 | 15 | 8 | 14 | 57 | 48 | 9 | 53 |
| 9 | Blackburn RoversBlackburn | 36 | 15 | 7 | 14 | 41 | 37 | 4 | 52 |
| 10 | Sheffield WednesdaySheff Weds | 37 | 14 | 9 | 14 | 53 | 58 | -5 | 51 |
| 11 | Norwich CityNorwich | 37 | 12 | 13 | 12 | 59 | 52 | 7 | 49 |
| 12 | Watford | 36 | 14 | 7 | 15 | 46 | 50 | -4 | 49 |
| 13 | Millwall | 36 | 12 | 12 | 12 | 36 | 37 | -1 | 48 |
| 14 | Queens Park RangersQPR | 37 | 11 | 11 | 15 | 42 | 48 | -6 | 44 |
| 15 | Preston North EndPreston | 37 | 9 | 17 | 11 | 37 | 43 | -6 | 44 |
| 16 | Swansea CitySwansea | 36 | 12 | 8 | 16 | 38 | 46 | -8 | 44 |
| 17 | Portsmouth | 36 | 11 | 9 | 16 | 44 | 57 | -13 | 42 |
| 18 | Oxford UnitedOxford Utd | 36 | 9 | 12 | 15 | 37 | 53 | -16 | 39 |
| 19 | Hull City | 36 | 9 | 10 | 17 | 36 | 45 | -9 | 37 |
| 20 | Stoke CityStoke | 36 | 8 | 12 | 16 | 36 | 50 | -14 | 36 |
| 21 | Cardiff CityCardiff | 37 | 8 | 12 | 17 | 40 | 61 | -21 | 36 |
| 22 | Derby CountyDerby | 37 | 9 | 8 | 20 | 37 | 49 | -12 | 35 |
| 23 | Luton TownLuton | 37 | 9 | 7 | 21 | 34 | 60 | -26 | 34 |
| 24 | Plymouth ArgylePlymouth | 36 | 6 | 12 | 18 | 36 | 73 | -37 | 30 |
| > Championship Full Table | |||||||||
