O'Donnell, Patrick S
Current rating: 1511
Record: 13-13
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 36 | Doyle, Michael (1554) | Won 2-0 | +191526 |
| 2sealed | 71 | Nickerson, Jonathan (1499) | Lost 1-2 | -181508 |
| 3sealed | 12 | Orr, Jim (1665) | Lost 0-2 | -151493 |
| 4sealed | 597 | Spears, Jason (1470) | Won 2-1 | +171510 |
| 5sealed | 622 | Canieso, Robert (1502) | Won 2-1 | +181528 |
| 6sealed | 437 | St. John, Adrian K (1555) | Lost 0-2 | -171511 |
| top | average opponent: 1541record: 3-3 | new rating: 1511 | ||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 101 | Fujii, Daisuke (1481) | Lost 0-2 | -181451 |
| 2sealed | 264 | Deyoe, Jennifer L (1483) | Won 2-0 | +191470 |
| 3sealed | 116 | Ferris, Dylan (1499) | Won 2-1 | +181488 |
| 4sealed | 134 | Wilson, Brendan (1516) | Won 2-1 | +191507 |
| 5sealed | 80 | Raska, Thomas (1539) | Won 2-0 | +191526 |
| 6sealed | 80 | Spence, Zack (1598) | Won 2-1 | +191545 |
| 7sealed | 34 | Flinn, Bradley E (1421) | Lost 0-2 | -201525 |
| 8sealed | 53 | Theriault, Jean-philip (1565) | Lost 1-2 | -181507 |
| top | average opponent: 1513record: 5-3 | new rating: 1507 | ||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 446 | Giraud, Andre (1500) | Lost 0-2 | -171447 |
| 2sealed | 710 | Reynolds, Nicholas (1482) | Lost 0-2 | -181429 |
| 3sealed | 718 | Brazzell, Davis (1481) | Won 2-0 | +191448 |
| 4sealed | 680 | Russell, Brian T (1482) | Won 2-1 | +191467 |
| 5sealed | 631 | Cheng, Sunny (1499) | Won 2-0 | +181485 |
| 6sealed | 590 | Charland, Peter (1519) | Lost 1-2 | -171468 |
| 7sealed | 561 | Samson, Roger (1499) | Lost 0-2 | -171451 |
| 8sealed | 523 | Williams, Albert (1482) | Won 2-0 | +181469 |
| top | average opponent: 1493record: 4-4 | new rating: 1469 | ||
| Grand Prix New Jersey 2006 (TSP limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 267 | Connor, Taylor P (1500) | Lost 0-2 | -181482 |
| 2sealed | 322 | Williams, Erik B (1481) | Lost 0-2 | -181464 |
| 3sealed | 372 | Davis, Joshua (1464) | Won 2-0 | +181482 |
| 4sealed | 303 | McKittrick, Nick (1481) | Lost 0-2 | -181464 |
| top | average opponent: 1482record: 1-3 | new rating: 1464 | ||