Halligan, John
Current rating: 1449
Record: 2-5-1
| Grand Prix Orlando 2004 (Mirrodin block) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 139 | Battles, Richard (1500) | Won 2-1 | +191503 |
| 2block | 26 | Jarmak, Chris (1518) | Lost 0-2 | -181485 |
| 3block | 157 | Bahnaman, Stephen (1501) | Lost 0-2 | -181467 |
| 4block | 177 | Drew, Raymond (1480) | Lost 0-2 | -181449 |
| average opponent: 1500record: 1-3 | new rating: 1449 | |||
| Grand Prix Tampa Bay 2002 (TOR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 86 | Bernat, Michael (1611) | Lost 0-1 | -161484 |
| 3sealed | 131 | Rose, Jason (1464) | Draw 1-1 | 01484 |
| 4sealed | 133 | Cook, Kenneth (1500) | Won 2-0 | +181502 |
| 5sealed | 103 | Underhill, Brad (1522) | Lost 1-2 | -181484 |
| average opponent: 1524record: 1-2-1 | new rating: 1484 | |||