O'Neill, Johnathan
Current rating: 1521
| Grand Prix Toronto 2018 (modern) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 226 | Warrington, Troy (1457) | Lost 1-2 | -201547 |
| 2modern | 403 | Canino, J. Miles (1484) | Won 2-0 | +161563 |
| 3modern | 596 | Mercado, Victor (1469) | Lost 1-2 | -191544 |
| 4modern | 620 | Bourque, Adrien (1431) | Lost 1-2 | -201524 |
| 5modern | 728 | Larratta, John (1461) | Won 2-1 | +161540 |
| 6modern | 520 | Formosa, Troy (1462) | Lost 0-2 | -191521 |
| top | average opponent: 1461record: 2-4 | new rating: 1521 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 137 | Houde, Louis (1519) | Won 2-1 | +191519 |
| 3sealed | 138 | Allard, Francois (1524) | Won 2-0 | +181537 |
| 4sealed | 134 | Santa, Richard (1562) | Won 2-1 | +181555 |
| 5sealed | 32 | Tharmaratnam, Samuel (1972) | Won 2-0 | +251580 |
| 6sealed | 24 | Bertorelli, Philip (1579) | Lost 0-2 | -181562 |
| 7sealed | 95 | Blondon, William (1596) | Draw 1-1 | +11563 |
| 8sealed | 65 | Mercier, Maxime (1571) | Won 2-1 | +181581 |
| 9sealed | 40 | DiMaggio, Matthew (1767) | Lost 1-2 | -141567 |
| top | average opponent: 1636record: 5-2-1 | new rating: 1567 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 404 | Parsons, Don (1482) | Won 2-1 | +181518 |
| 2sealed | 229 | Seelye, Lisa (1350) | Lost 0-2 | -211497 |
| 3sealed | 575 | Vienneau, Matthew (1667) | Won 2-1 | +211518 |
| 4sealed | 401 | Cote, Jonathan (1516) | Won 2-1 | +181536 |
| 5sealed | 308 | Chan, Norman (1607) | Lost 0-2 | -171519 |
| 6sealed | 370 | Lindgren, Eric (1485) | Lost 1-2 | -191500 |
| top | average opponent: 1518record: 3-3 | new rating: 1500 | ||