# 2017 Segunda División B play-offs

The 2017 Segunda División B play-offs (Playoffs de Ascenso or Promoción de Ascenso) are the final playoffs for promotion from 2016–17 Segunda División B to the 2017–18 Segunda División. The four first placed teams in each one of the four qualify for the promotion playoffs and the four last placed teams in Segunda División are relegated to Segunda División B. It also decides the teams which placed 16th to be relegated to the 2017–18 Tercera División.

## Format

The four group winners have the opportunity to promote directly and become the overall Segunda División B champion. The four group winners will be drawn into a two-legged series where the two winners will be promoted to the Segunda División and will enter into the final for the Segunda División B champion. The two losing semifinalists will enter the playoff round for the last two promotion spots.
The four group runners-up will be drawn against one of the three fourth-placed teams outside their group while the four third-placed teams will be drawn against each other in a two-legged series. The six winners will advance with the two losing semifinalists to determine the four teams that will enter the last two-legged series for the last two promotion spots. In all the playoff series, the lower-ranked club will play at home first. Whenever there is a tie in position (e.g. like the group winners in the Semifinal Round and Final or the third-placed teams in the first round), a draw will determine the club to play at home first.

## Group Winners promotion play-off
### Qualified teams

| Group | Team |
| 1 | Cultural Leonesa |
| 2 | Albacete |
| 3 | Barcelona B |
| 4 | Lorca FC |

### Bracket

| Semifinals | Semifinals | Semifinals | Semifinals | Finals | Finals | Finals | Finals |
| Albacete | 1 | 0 | 1 |
| Lorca FC (a) | 1 | 0 | 1 | | | | |
| Lorca FC (a) | 1 | 0 | 1 | Lorca FC | 1 | 1 | 2 |
| | | | | Cultural Leonesa | 1 | 3 | 4 |
| Barcelona B | 0 | 1 | 1 | Cultural Leonesa | 1 | 3 | 4 |
| Cultural Leonesa | 2 | 2 | 4 | | | | |

### Matches
#### Semifinals

| Team 1 | Agg.Tooltip Aggregate score | Team 2 | 1st leg | 2nd leg |
| Barcelona B | 1–4 | Cultural Leonesa | 0–2 | 1–2 |
| Albacete | 1–1 (a) | Lorca FC | 1–1 | 0–0 |

##### Second leg

Promoted to Segunda División :
| Cultural Leonesa (42 years later) | Lorca FC (First time ever) |

#### Final

| Team 1 | Agg.Tooltip Aggregate score | Team 2 | 1st leg | 2nd leg |
| Lorca FC | 2–4 | Cultural Leonesa | 1–1 | 1–3 |
* Segunda División B 2016–17 champions
* Cultural Leonesa

## Non-champions promotion play-off
### First round
#### Qualified teams

| Group | Pos. | Team |
| 1 | 2nd | Racing Santander |
| 2 | 2nd | Toledo |
| 3 | 2nd | Alcoyano |
| 4 | 2nd | Murcia |
| Group | Pos. | Team |
| 1 | 3rd | Celta Vigo B |
| 2 | 3rd | Fuenlabrada |
| 3 | 3rd | Valencia Mestalla |
| 4 | 3rd | Villanovense |
| Group | Pos. | Team |
| 1 | 4th | Pontevedra |
| 2 | 4th | Rayo Majadahonda |
| 3 | 4th | Atlético Baleares |
| 4 | 4th | Cartagena |

#### Matches

| Team 1 | Agg.Tooltip Aggregate score | Team 2 | 1st leg | 2nd leg |
| Atlético Baleares | 3–1 | Toledo | 1–0 | 2–1 |
| Cartagena | 2–0 | Alcoyano | 0–0 | 2–0 |
| Pontevedra | 2–4 | Murcia | 1–3 | 1–1 |
| Rayo Majadahonda | 1–6 | Racing Santander | 1–3 | 0–3 |
| Villanovense | 2–0 | Fuenlabrada | 1–0 | 1–0 |
| Celta Vigo B | 3–6 | Valencia Mestalla | 2–3 | 1–3 |

##### Second leg
### Second round
#### Qualified teams

| Group | Pos. | Team |
| 2 | 1st | Albacete |
| 3 | 1st | Barcelona B |
| Group | Pos. | Team |
| 1 | 2nd | Racing Santander |
| 4 | 2nd | Murcia |
| Group | Pos. | Team |
| 3 | 3rd | Valencia Mestalla |
| 4 | 3rd | Villanovense |
| Group | Pos. | Team |
| 3 | 4th | Atlético Baleares |
| 4 | 4th | Cartagena |

#### Matches

| Team 1 | Agg.Tooltip Aggregate score | Team 2 | 1st leg | 2nd leg |
| Atlético Baleares | 2–3 | Albacete | 1–1 | 1–2 (a.e.t.) |
| Cartagena | 2–2 (a) | Barcelona B | 1–2 | 1–0 |
| Villanovense | 2–4 | Racing Santander | 2–0 | 0–4 |
| Valencia Mestalla | 2–1 | Murcia | 2–1 | 0–0 |

##### Second leg
### Third round
#### Qualified teams

| Group | Pos. | Team |
| 2 | 1st | Albacete |
| 3 | 1st | Barcelona B |
| Group | Pos. | Team |
| 1 | 2nd | Racing Santander |
| Group | Pos. | Team |
| 3 | 3rd | Valencia Mestalla |

#### Matches

| Team 1 | Agg.Tooltip Aggregate score | Team 2 | 1st leg | 2nd leg |
| Valencia Mestalla | 0–1 | Albacete | 0–1 | 0–0 |
| Racing Santander | 1–4 | Barcelona B | 1–4 | 0–0 |

##### Second leg

Promoted to Segunda División :
| Albacete (One year later) | Barcelona B (2 years later) |

## Relegation play-off
### Qualified teams

| Group | Pos. | Team |
| 1 | 16th | Burgos |
| 2 | 16th | San Sebastián de los Reyes |
| 3 | 16th | Atlético Levante |
| 4 | 16th | Linares |

### Matches

The losers of this series will be relegated to the 2017–18 Tercera División.
| Team 1 | Agg.Tooltip Aggregate score | Team 2 | 1st leg | 2nd leg |
| Atlético Levante | 0–0 (1–3 p) | San Sebastián de los Reyes | 0–0 | 0–0 (a.e.t.) |
| Burgos | 2–1 | Linares | 0–0 | 2–1 |

#### Second leg

Relegated to Tercera División :
| Atlético Levante | Linares |