Mahoney, Joe
Current rating: 1421
Record: 17-24-1
| Grand Prix San Diego 2013 (modern) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 181 | Gilmore, Michael (1500) | Lost 1-2 | -171438 |
| 2modern | 224 | Galarza, Joshua (1482) | Lost 0-2 | -171421 |
| 3modern | 294 | Smith, Logan (1442) | Won 2-1 | +181439 |
| 4modern | 307 | Glenn, Brian (1460) | Lost 0-2 | -181421 |
| top | average opponent: 1471record: 1-3 | new rating: 1421 | ||
| Grand Prix Salt Lake City 2012 (DKA standard) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 60 | McKercher, Joseph (1488) | Lost 0-2 | -181453 |
| 4standard | 181 | Thompson, David (1502) | Won 2-0 | +191472 |
| 5standard | 109 | Hogan, Kyle (1535) | Won 2-0 | +191491 |
| 6standard | 146 | Beety, John Dale (1463) | Won 2-1 | +171508 |
| 7standard | 56 | Alvord IV, Charles (1506) | Lost 0-2 | -181490 |
| 8standard | 90 | Penrod, Jacob (1557) | Lost 1-2 | -161474 |
| 9standard | 168 | Shipler, Justin (1437) | Lost 1-2 | -191455 |
| top | average opponent: 1498record: 3-4 | new rating: 1455 | ||
| Grand Prix San Diego 2011 (ISD limited) | starting rating: 1475 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 452 | Wadsworth, Austin (1518) | Won 2-0 | +191494 |
| 3sealed | 417 | Nelson, Brandon (1883) | Lost 0-2 | -121482 |
| 4sealed | 544 | Mcnair, Kendric (1518) | Won 2-1 | +191501 |
| 5sealed | 520 | Houseworth, Erik (1561) | Lost 1-2 | -171484 |
| 6sealed | 540 | Petronzio, Nicolas (1501) | Won 2-0 | +191503 |
| 7sealed | 467 | Salvatto, Luis (1691) | Lost 0-2 | -151488 |
| 8sealed | 509 | Weidetz, Erich (1525) | Lost 1-2 | -171471 |
| top | average opponent: 1599record: 3-4 | new rating: 1471 | ||
| Grand Prix Seattle 2005 (extended) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 33 | Doshi, Vishvas (1703) | Lost 1-2 | -141473 |
| 5extended | 80 | Luttmann, Alexander (1524) | Lost 0-2 | -171456 |
| 6extended | 72 | Martin, Paul (1517) | Won 2-1 | +191475 |
| 7extended | 59 | Harper, Chris (1433) | Won 2-0 | +171492 |
| 8extended | 40 | Carlman, Cody (1537) | Lost 0-2 | -171475 |
| top | average opponent: 1543record: 2-3 | new rating: 1475 | ||
| Grand Prix Oakland 2004 (DST limited) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 61 | Aune, Eirik (1500) | Lost 0-2 | -181505 |
| 3sealed | 122 | Masterson, Ryan (1500) | Lost 0-2 | -181487 |
| top | average opponent: 1500record: 0-2 | new rating: 1487 | ||
| Grand Prix Anaheim 2003 (extended) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 4extended | 26 | Rietzl, Paul (1641) | Draw 1-1 | +11555 |
| 5extended | 25 | Prochak, Chris (1557) | Won 2-0 | +181573 |
| 6extended | 12 | Barnett, Noah (1521) | Won 2-0 | +171590 |
| 7extended | 6 | Stark, Ben S (1990) | Lost 1-2 | -111579 |
| 8extended | 16 | Pustilnik, Michael (1826) | Won 2-0 | +231602 |
| 9extended | 10 | Herzog, Cameron (1567) | Lost 1-2 | -191583 |
| 10extended | 20 | Harvey, Eugene (1907) | Lost 1-2 | -121571 |
| 11extended | 26 | Sonne, Jonathan (1870) | Lost 0-2 | -131558 |
| 12extended | 29 | Freeman, Lance (1478) | Lost 1-2 | -191539 |
| 13extended | 30 | Job, Jonathan (1691) | Lost 0-2 | -161523 |
| top | average opponent: 1705record: 3-6-1 | new rating: 1523 | ||
| Grand Prix Las Vegas 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 142 | Soo, Waiken (1530) | Won 2-1 | +191519 |
| 2extended | 77 | Lewis, David (1500) | Won 2-1 | +171536 |
| 3extended | 36 | Chiang, Wayne (1518) | Lost 0-2 | -181518 |
| 4extended | 140 | Venini, Dustin (1517) | Won 2-1 | +181536 |
| 5extended | 70 | Nemati, Kathy (1555) | Lost 0-2 | -181518 |
| 6extended | 108 | Rivera, Tim (1481) | Won 2-0 | +181536 |
| 7extended | 75 | Macedo, Ryan (1550) | Won 2-0 | +181554 |
| top | average opponent: 1522record: 5-2 | new rating: 1554 | ||