Pettengill, Morgan
Current rating: 1517
Record: 6-5-1
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 150 | Zadrejko, Jonathan (1481) | Lost 1-2 | -181499 |
| 3extended | 191 | Brantner, Drew (1499) | Lost 1-2 | -181481 |
| 4extended | 329 | Johnson, Robert F (1482) | Won 2-0 | +181499 |
| 5extended | 320 | Xu, Jimmy (1501) | Won 2-0 | +181517 |
| 6extended | 248 | Berry, Craig (1517) | Won 2-0 | +181535 |
| 7extended | 94 | Wolloch, Adam (1537) | Lost 0-2 | -181517 |
| average opponent: 1503record: 3-3 | new rating: 1517 | |||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 32 | Countryman, Joseph (1500) | Lost 0-2 | -181482 |
| 2block | 248 | Houle, Sebastien (1482) | Draw 1-1 | 01482 |
| 3block | 271 | Hsu, Mike (1482) | Won 2-0 | +181500 |
| 4block | 245 | Sullivan, Andrew (1505) | Won 1-0 | +181518 |
| 5block | 174 | Hamblet, Eli (1518) | Won 2-0 | +181536 |
| 6block | 111 | Siler, Matt (1493) | Lost 0-2 | -191517 |
| average opponent: 1497record: 3-2-1 | new rating: 1517 | |||