NCAA Season 81
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| NCAA Season 81 | |||||||||
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| One @ 81: Values Formation Through Sports | |||||||||
| Host school |  Colegio de San Juan de Letran | ||||||||
| General | |||||||||
| Seniors |  Benilde Blazers | ||||||||
| Juniors |  San Sebastian Staglets | ||||||||
| Seniors' champions | |||||||||
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| Juniors' champions | |||||||||
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| (NT) = No tournament; (DS) = Demonstration Sport; (Ex) = Exhibition; | |||||||||
NCAA Season 81 was the 2005-2006 season of the National Collegiate Athletic Association (Philippines). Colegio de San Juan de Letran was the season's host.
To usher in the new season, Letran and the other NCAA member schools performed the opening ceremonies at the Araneta Coliseum, followed by four basketball games on June 25, 2005. Other disciplines started their own tournaments within the following months, with beach volleyball as the last tournament on mid-March.
De La Salle-College of Saint Benilde won its first General Championship honors for the Seniors division, while the San Sebastian Recoletos High School won its second Juniors General Championship, via tiebreakers, when La Salle Green Hills emerged with an equal number of points.
Basketball
Men's tournament
Elimination round
| Pos | Team | W | L | PCT | GB | Qualification |
|---|---|---|---|---|---|---|
| 1 |  Letran Knights (H)
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13 | 1 | .929 | — | Twice-to-beat in the semifinals |
| 2 |  PCU Dolphins
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10 | 4 | .714 | 3 | |
| 3 |  Mapúa Cardinals
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9 | 5 | .643 | 4 | Twice-to-win in the semifinals |
| 4 | San Sebastian Stags
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7 | 7 | .500 | 6 | |
| 5 |  Perpetual Altas
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6 | 8 | .429 | 7 | |
| 6 | Benilde Blazers
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5 | 9 | .357 | 8 | |
| 7 |  San Beda Red Lions
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4 | 10 | .286 | 9 | |
| 8 |  JRU Heavy Bombers
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2 | 12 | .143 | 11 |
Rules for classification: 1) winning percentage; 2) if tied for top 4, one-game playoff; 3) head-to-head record; 4) head-to-head point differential; 5) overall point differential
(H) Hosts
Bracket
Individual awards
- Most Valuable Player: Ernie Jay Sagad (CSB)
- Rookie of the Year: Kelvin dela Peña (Mapua)
Juniors basketball tournament
Elimination round
| Pos | Team | W | L | PCT | GB | Qualification |
|---|---|---|---|---|---|---|
| 1 | San Sebastian Staglets
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11 | 1 | .917 | — | Twice-to-beat in the semifinals |
| 2 | San Beda Red Cubs
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10 | 2 | .833 | 1 | |
| 3 | PCU Baby Dolphins
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7 | 5 | .583[a] | 4 | Twice-to-win in the semifinals |
| 4 | JRU Light Bombers
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7 | 5 | .583[a] | 4 | |
| 5 | La Salle Green Hills Greenies
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5 | 7 | .417 | 6 | |
| 6 | Perpetual Junior Altas
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2 | 10 | .167 | 9 | |
| 7 | Letran Squires[b] (H)
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0 | 12 | .000 | 11 |
Rules for classification: 1) winning percentage; 2) if tied for top 4, one-game playoff; 3) head-to-head record; 4) head-to-head point differential; 5) overall point differential
(H) Hosts
Notes:
- ^ a b Third-seed playoff: PCU 96–90 JRU
- ^ All of Letran's wins were forfeited when a player was found to have played in a ligang labas game.
Bracket
Template:RPFinalFourbracket-ko
Individual awards
- Most Valuable Player: Allan Mangahas (PCU-Union)
- Rookie of the Year: Darell Green (Letran)
Other sports and General Championship
Championship results
Arranged by order of conclusion:
Juniors division
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Seniors division
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¹ Not a part in the tabulation of the General Championship
General Championship
Seniors division
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Juniors division
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¹ Since San Sebastian had more championships (4) than LSGH (3), San Sebastian won the General Championship, despite being tied for first place.
² Mapua did not send representatives in the Juniors division
