MacCallum, Scott
Current rating: 1638
Record: 28-20-1
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1666 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 251 | Patullo, Stephen (1500) | Lost 1-2 | -211645 |
| 2standard | 495 | Jensen, Christine (1444) | Won 2-0 | +141659 |
| 3standard | 403 | Farrenkopf, Brian (1466) | Won 2-0 | +151674 |
| 4standard | 401 | Burrows, Matthew (1511) | Draw 1-1 | -31671 |
| 5standard | 350 | Goetz, Anthony (1506) | Won 2-0 | +151686 |
| 6standard | 217 | Petrescu, Adrian (1536) | Lost 1-2 | -211665 |
| 7standard | 328 | Tomiak, Christian (1517) | Won 2-0 | +151680 |
| 8standard | 230 | Guenther, Nolan (1492) | Lost 1-2 | -211659 |
| 9standard | 219 | Way, Dean (1517) | Lost 1-2 | -211638 |
| top | average opponent: 1499record: 4-4-1 | new rating: 1638 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1543 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 260 | Hartman, Christopher (1588) | Won 2-0 | +191562 |
| 2modern | 255 | Fabrini, James (1590) | Won 2-1 | +181580 |
| 3modern | 156 | Zarichny, Brandon (1514) | Lost 1-2 | -191561 |
| 4modern | 186 | DeRusso, Tony (1521) | Lost 0-2 | -191542 |
| 5modern | 344 | Zubrycki, Hiram (1503) | Won 2-0 | +171559 |
| 6modern | 269 | Martin, Charles (1518) | Won 2-1 | +181577 |
| 7modern | 236 | Delcourt, Cassidy (1538) | Won 2-1 | +171594 |
| 8modern | 158 | Setzer, Will (1559) | Won 2-0 | +171611 |
| 9modern | 94 | Sui, Xin (1816) | Won 2-0 | +221633 |
| 10modern | 93 | Pyka, Jeffrey (1950) | Won 2-0 | +241657 |
| 11modern | 29 | Walter, Royce (1781) | Won 2-0 | +201677 |
| 12modern | 34 | Pelrine, Josh (1668) | Lost 1-2 | -181659 |
| 13modern | 62 | Benson, Jonathan (1951) | Lost 1-2 | -131646 |
| 14modern | 71 | Duerr, Eric (1749) | Won 0-0 | +201666 |
| 15modern | 62 | Remmes, James (1587) | ID | 01666 |
| top | average opponent: 1655record: 10-4-1 | new rating: 1666 | ||
| Grand Prix Calgary 2013 (M14 standard) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 61 | Stanbury, Cory (1500) | Lost 0-0 | -181489 |
| 2standard | 61 | Kwok, Eugene (1482) | Lost 1-2 | -181471 |
| 3standard | 61 | Moffatt, Cameron (1500) | Won 2-0 | +181489 |
| 4standard | 61 | Selk, Patrick (1607) | Lost 1-2 | -161473 |
| 5standard | 61 | Hewitt, Rebecca (1431) | Won 2-0 | +181491 |
| 6standard | 61 | Suart, Connor (1449) | Won 2-0 | +171508 |
| 7standard | 61 | Mah, Fay (1500) | Won 2-0 | +181526 |
| 8standard | 61 | Ho, Chien (1479) | Won 2-1 | +171543 |
| top | average opponent: 1493record: 5-3 | new rating: 1543 | ||
| Grand Prix Toronto 2012 (modern) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 4modern | 4 | Siow, Lucas (1843) | Lost 0-2 | -121504 |
| 5modern | 4 | Houghton, Derek (1506) | Lost 1-2 | -181486 |
| 6modern | 4 | Martin, Cory (1523) | Won 2-1 | +181504 |
| 7modern | 4 | Linde, Matt (1630) | Won 2-1 | +211525 |
| 8modern | 4 | Liu, Brian (1542) | Lost 0-2 | -181507 |
| top | average opponent: 1609record: 2-3 | new rating: 1507 | ||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 206 | Hebert, Justin (1500) | Lost 1-2 | -181500 |
| 2sealed | 225 | Nguyen, Robert (1472) | Won 2-1 | +181518 |
| 3sealed | 205 | Brill, Christopher (1501) | Lost 1-2 | -191499 |
| 4sealed | 270 | Kim, Michael D (1482) | Lost 0-2 | -181481 |
| 5sealed | 248 | Flannagan, Jaxon (1464) | Won 2-1 | +181499 |
| 6sealed | 191 | Starrs, Sean (1454) | Won 2-1 | +171516 |
| top | average opponent: 1479record: 3-3 | new rating: 1516 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 771 | Lazaro, Andrew (1500) | Won 2-0 | +181518 |
| 2standard | 662 | Tomecek, Grayson M (1518) | Won 2-1 | +181536 |
| 3standard | 624 | Hillegas, Richard L (1537) | Lost 0-2 | -181518 |
| 4standard | 833 | Neeley, Dan (1542) | Won 2-1 | +181536 |
| 5standard | 759 | Lapine, Michael (1639) | Won 2-1 | +201556 |
| 6standard | 695 | Shields, Jharick (1473) | Lost 0-2 | -191537 |
| 7standard | 673 | Nijhawan, Rishi (1518) | Lost 0-2 | -191518 |
| top | average opponent: 1532record: 4-3 | new rating: 1518 | ||