Mangrum, Derek
Current rating: 1449
Record: 1-4
| Grand Prix Phoenix 2017 (XLN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 50 | Allen, Alexander (1533) | Won 2-0 | +191519 |
| 2sealed | 149 | Trendall, Tim (1450) | Lost 1-2 | -201499 |
| 3sealed | 421 | Poole, Erik (1503) | Lost 0-2 | -181481 |
| 4sealed | 413 | Mercier, Mathew (1652) | Lost 0-2 | -141467 |
| 5sealed | 482 | Hundemer, Greg (1466) | Lost 1-2 | -181449 |
| average opponent: 1521record: 1-4 | new rating: 1449 | |||