The 26-year-old, who has joined the La Liga outfit on a four-year contract, has made the switch following a stint in Ligue 1 with Evian TG.
During his four-season spell with Evian, the winger scored 23 goals in 133 appearances.
Wass is the second player to have joined Celta this summer following the loan addition of Iago Aspas.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| C | Real Madrid | 34 | 27 | 6 | 1 | 74 | 22 | 52 | 87 |
| 2 | GironaGirona | 34 | 23 | 5 | 6 | 73 | 42 | 31 | 74 |
| 3 | Barcelona | 34 | 22 | 7 | 5 | 70 | 43 | 27 | 73 |
| 4 | Atletico MadridAtletico | 34 | 21 | 4 | 9 | 63 | 39 | 24 | 67 |
| 5 | Athletic Bilbao | 34 | 17 | 10 | 7 | 55 | 33 | 22 | 61 |
| 6 | Real Sociedad | 34 | 14 | 12 | 8 | 48 | 35 | 13 | 54 |
| 7 | Real BetisBetis | 34 | 13 | 13 | 8 | 43 | 39 | 4 | 52 |
| 8 | Valencia | 34 | 13 | 8 | 13 | 37 | 39 | -2 | 47 |
| 9 | Villarreal | 34 | 12 | 9 | 13 | 56 | 58 | -2 | 45 |
| 10 | Getafe | 34 | 10 | 13 | 11 | 41 | 47 | -6 | 43 |
| 11 | AlavesAlaves | 34 | 11 | 8 | 15 | 32 | 38 | -6 | 41 |
| 12 | Sevilla | 34 | 10 | 11 | 13 | 45 | 46 | -1 | 41 |
| 13 | Osasuna | 34 | 11 | 6 | 17 | 37 | 51 | -14 | 39 |
| 14 | Las PalmasLas Palmas | 34 | 10 | 7 | 17 | 30 | 43 | -13 | 37 |
| 15 | Celta Vigo | 34 | 8 | 10 | 16 | 40 | 52 | -12 | 34 |
| 16 | Rayo Vallecano | 34 | 7 | 13 | 14 | 27 | 43 | -16 | 34 |
| 17 | Mallorca | 34 | 6 | 14 | 14 | 27 | 40 | -13 | 32 |
| 18 | CadizCadiz | 34 | 4 | 14 | 16 | 23 | 49 | -26 | 26 |
| 19 | Granada | 34 | 4 | 9 | 21 | 36 | 64 | -28 | 21 |
| R | Almeria | 34 | 2 | 11 | 21 | 33 | 67 | -34 | 17 |
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