Portillo, Erik
Current rating: 1514
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1533 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 150 | Arcilla, Kevin (1500) | Won 2-0 | +171550 |
| 2modern | 260 | Lewis, Michael (1415) | Lost 0-2 | -201530 |
| 3modern | 554 | Nguyen, Daniel (1612) | Lost 0-2 | -171513 |
| 4modern | 948 | Rodriguez, Sergio (1505) | Won 2-1 | +181531 |
| 5modern | 755 | Adderson, Russell (1582) | Lost 0-2 | -171514 |
| top | average opponent: 1523record: 2-3 | new rating: 1514 | ||
| Grand Prix Detroit 2013 (modern) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 252 | Spear, Kurtis (1500) | Lost 0-2 | -181499 |
| 2modern | 468 | McCauley, Devin (1482) | Lost 0-0 | -181481 |
| 3modern | 642 | Sears, Ryan (1462) | Won 2-1 | +171498 |
| 4modern | 620 | Chung, Michael (1500) | Won 2-0 | +181516 |
| 5modern | 527 | DeStefano, Alexander (1472) | Won 2-0 | +171533 |
| 6modern | 421 | Earnest, John (1516) | Won 2-0 | +181551 |
| 7modern | 183 | Borgeat, Mathieu (1534) | Lost 0-2 | -181533 |
| top | average opponent: 1495record: 4-3 | new rating: 1533 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 322 | Truong, Long (1519) | Lost 1-2 | -181482 |
| 2standard | 328 | Roche, Steven M (1467) | Won 2-1 | +181500 |
| 3standard | 237 | Estrada, Caleb (1340) | Lost 0-2 | -211479 |
| 4standard | 378 | Deneka, Phillip (1483) | Won 2-1 | +181497 |
| 5standard | 214 | Karleskint, Patrick J (1501) | Won 2-1 | +181515 |
| 6standard | 214 | Lewis, Michael (1538) | Won 2-0 | +191534 |
| 7standard | 133 | Ware, Carter (1536) | Lost 1-2 | -181516 |
| 8standard | 137 | Bongiovanni, Mauro (1607) | Lost 0-2 | -171499 |
| 9standard | 110 | Stojak, Peter (1489) | Won 2-1 | +181517 |
| top | average opponent: 1498record: 5-4 | new rating: 1517 | ||