The Spain Under-19 international has been loaned back to Zaragoza for the 2015-16 campaign.
Vallejo, 28, made his senior debut at the start of last season before going on to play 33 times for the Segunda Division side.
The centre-back has featured for his country at Under-16, Under-17, Under-19 and Under-21 levels.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Barcelona | 28 | 20 | 3 | 5 | 78 | 27 | 51 | 63 |
| 2 | Real Madrid | 28 | 18 | 6 | 4 | 59 | 27 | 32 | 60 |
| 3 | Atletico MadridAtletico | 28 | 16 | 8 | 4 | 46 | 22 | 24 | 56 |
| 4 | Athletic Bilbao | 28 | 14 | 10 | 4 | 46 | 24 | 22 | 52 |
| 5 | Villarreal | 27 | 12 | 8 | 7 | 49 | 38 | 11 | 44 |
| 6 | Real BetisBetis | 28 | 12 | 8 | 8 | 38 | 35 | 3 | 44 |
| 7 | Mallorca | 28 | 11 | 7 | 10 | 28 | 34 | -6 | 40 |
| 8 | Celta Vigo | 28 | 11 | 6 | 11 | 41 | 41 | 0 | 39 |
| 9 | Rayo Vallecano | 28 | 9 | 10 | 9 | 31 | 31 | 0 | 37 |
| 10 | Getafe | 28 | 9 | 9 | 10 | 25 | 23 | 2 | 36 |
| 11 | Sevilla | 28 | 9 | 9 | 10 | 32 | 37 | -5 | 36 |
| 12 | Real Sociedad | 28 | 10 | 5 | 13 | 25 | 30 | -5 | 35 |
| 13 | GironaGirona | 28 | 9 | 7 | 12 | 36 | 41 | -5 | 34 |
| 14 | Osasuna | 28 | 7 | 12 | 9 | 33 | 42 | -9 | 33 |
| 15 | Espanyol | 27 | 7 | 7 | 13 | 26 | 39 | -13 | 28 |
| 16 | Valencia | 28 | 6 | 10 | 12 | 31 | 46 | -15 | 28 |
| 17 | AlavesAlaves | 28 | 6 | 9 | 13 | 32 | 42 | -10 | 27 |
| 18 | Leganes | 28 | 6 | 9 | 13 | 26 | 43 | -17 | 27 |
| 19 | Las PalmasLas Palmas | 28 | 6 | 7 | 15 | 32 | 47 | -15 | 25 |
| 20 | Real ValladolidValladolid | 28 | 4 | 4 | 20 | 18 | 63 | -45 | 16 |
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