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Buong Pangalan: Jefferson Alexander Sierra Flores
Pangalan ng Shirt: SIERRA
Posisyon: M(C)
Marka: 78
Edad: 31 (May 13, 1993)
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Player Position
Posisyon: M(C)
Position Desc: Pangkalahatang Midfielder.
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Kasaysayan ng Rating
Kasaysayan Player
| Petsa | koponan | Marka |
| Mar 5, 2023 | Manta FC | 78 |
| Mar 22, 2022 | Deportivo Quito | 78 |
| May 19, 2021 | Cumbayá FC | 78 |
| Feb 8, 2021 | CD Olmedo | 78 |
| Mar 2, 2019 | CD Olmedo | 78 |
| Nov 7, 2017 | Manta FC | 78 |
| Jul 24, 2016 | Delfín SC | 78 |
| Jul 2, 2014 | Manta FC | 78 |
| Apr 17, 2013 | Manta FC | 78 |
Manta FC Pulutong
| # | Nat | Manlalaro | Pos | Edad | RT | |
|---|---|---|---|---|---|---|
 | Roberto Valarezo | M(RC) | 33 | 77 | ||
| 27 |  | Marcos Acosta | D(LC),DM(L) | 33 | 78 | |
| 30 |  | Kéner Arce | DM,M(C) | 36 | 73 | |
| Jefferson Sierra | M(C) | 31 | 78 | ||
 | Christian Alemán | M(C),AM(RLC) | 29 | 78 | ||
| 77 |  | Jeison Domínguez | D,DM,M(L) | 29 | 73 | |
 | Emiliano Agüero | M(C) | 30 | 78 | ||
| 6 |  | Facundo Ospitaleche | DM,M(C) | 28 | 76 | |
| 26 |  | Arián Pucheta | D(C) | 30 | 76 | |
 | Ronaldo Johnson | D,DM,M(L),AM(RLC) | 29 | 77 | ||
| 25 | | Juan Rojas | AM,F(RLC) | 32 | 75 | |
| César Batalla | D(LC) | 28 | 76 | ||
| Marcos Cangá | D,DM,M,AM,F(R) | 36 | 77 | ||
| 9 | | Daniel Valencia | AM,F(RL) | 29 | 76 | |
| 70 | |  | AM,F(RL) | 23 | 73 | |
| 19 | |  | M(C),AM(LC) | 22 | 73 | |
 | Danny Cabezas | DM,M,AM(C) | 32 | 77 | ||
| 13 | | Bryan Ayoví | D,DM,M(R),AM(RL) | 26 | 71 | |
| 1 | | Mario Valero | GK | 29 | 77 | |
| 53 | | Kevin Valencia | AM(RL),F(RLC) | 24 | 74 |