Mermelshtayn, Joe
Current rating: 1522
Record: 28-26-3
| Grand Prix Phoenix 2020 (pioneer) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 162 | Garrett, Hunter (1595) | Lost 0-2 | -181546 |
| 2pioneer | 263 | Mount, David (1365) | Won 2-0 | +151561 |
| 3pioneer | 281 | Reule, Dylan (1468) | Lost 1-2 | -201541 |
| 4pioneer | 354 | Everett, Jeff (1469) | Lost 1-2 | -191522 |
| top | average opponent: 1474record: 1-3 | new rating: 1522 | ||
| Grand Prix Phoenix 2019 (ELD limited) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 98 | Fuchs, Willis (1532) | Lost 0-2 | -181512 |
| 2sealed | 199 | Moffet, Trevor (1482) | Won 2-0 | +181530 |
| 3sealed | 158 | Nietz, Travis (1506) | Won 2-1 | +171547 |
| 4sealed | 102 | Ostash, Keith (1764) | Lost 1-2 | -141533 |
| 5sealed | 155 | Butler, John (1400) | Lost 0-2 | -201513 |
| 6sealed | 174 | Niederauer, Scott (1287) | Won 2-0 | +141527 |
| 7sealed | 134 | Judd, Andre (1652) | Won 2-0 | +201547 |
| 8sealed | 99 | Wiggins, Craig (1487) | Won 2-0 | +171564 |
| top | average opponent: 1514record: 5-3 | new rating: 1564 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1538 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2157 | McGrath, Justin (1427) | Won 2-0 | +161554 |
| 2sealed | 147 | Ho-Ten-Pow, Marino (1652) | Lost 0-2 | -161538 |
| 3sealed | 849 | Sage, Carl (1500) | Won 2-1 | +171555 |
| 4sealed | 677 | Kelly, Bryan (1358) | Won 2-0 | +151570 |
| 5sealed | 490 | Wadsworth, Jared (1546) | Lost 1-2 | -191551 |
| 6sealed | 546 | Meadows, Chase (1522) | Lost 1-2 | -181533 |
| 7sealed | 590 | Flautz, Ronald (1511) | Won 2-0 | +171550 |
| 8sealed | 361 | Barrantes, Jose (1426) | Lost 0-2 | -201530 |
| top | average opponent: 1493record: 4-4 | new rating: 1530 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 70 | Sutton, Michael (1500) | Won 2-0 | +171534 |
| 2sealed | 144 | Singleton, Chris (1417) | Won 2-1 | +161550 |
| 3sealed | 131 | Majlaton, Alex (1801) | Won 2-1 | +231573 |
| 4sealed | 46 | Olvera, Bryan (1731) | Won 2-0 | +201593 |
| 5sealed | 27 | Dickel, Matthew (1545) | Lost 0-2 | -181575 |
| 6sealed | 77 | Randall, Cody (1535) | Lost 0-2 | -191556 |
| 7sealed | 140 | AuCoin, Ryan (1570) | Lost 1-2 | -181538 |
| top | average opponent: 1585record: 4-3 | new rating: 1538 | ||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 249 | Shuker, Swift (1500) | Draw 1-1 | -11536 |
| 2standard | 426 | Sulak, Andrew (1480) | Won 2-0 | +171553 |
| 3standard | 373 | Johnson, Jordan (1475) | Won 2-1 | +171570 |
| 4standard | 194 | Beal, Justin (1538) | Lost 0-2 | -191551 |
| 5standard | 363 | Pannell, Thomas (1653) | Lost 0-2 | -161535 |
| 6standard | 508 | Wingert, James (1503) | Lost 0-2 | -181517 |
| top | average opponent: 1525record: 2-3-1 | new rating: 1517 | ||
| Grand Prix Oakland 2013 (M14 limited) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 93 | Fulton, Ben (1500) | Lost 0-2 | -181484 |
| 2sealed | 598 | G318, Kodo (1482) | Won 2-0 | +181502 |
| 3sealed | 478 | Flynn, Randy (1518) | Won 2-1 | +181520 |
| 4sealed | 322 | Smalley, Benjamin (1484) | Won 2-0 | +171537 |
| 5sealed | 143 | Simon, Michael (1668) | Lost 0-2 | -151522 |
| 6sealed | 30 | Woolley, Justin (1483) | Won 2-1 | +171539 |
| 7sealed | 27 | Powell, Adam (1442) | Won 2-1 | +161555 |
| 8sealed | 133 | Chen, John (1480) | Lost 0-2 | -191536 |
| 9sealed | 150 | Arce, Aaron (1592) | Draw 1-1 | +11537 |
| top | average opponent: 1517record: 5-3-1 | new rating: 1537 | ||
| Grand Prix San Diego 2011 (ISD limited) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 442 | Louis S., (1500) | Draw 1-1 | 01502 |
| 2sealed | 521 | Cunningham, Michael (1483) | Lost 1-2 | -181484 |
| 3sealed | 580 | Jennings, Todd (1482) | Won 2-0 | +181502 |
| 4sealed | 577 | Sakata, Derek (1501) | Lost 1-2 | -181484 |
| 5sealed | 598 | Iannarone, Antonio J (1482) | Won 2-0 | +181502 |
| 6sealed | 561 | Shipler, Justin (1499) | Won 2-0 | +181520 |
| 7sealed | 522 | Dumanski, Trent L (1516) | Lost 0-2 | -181502 |
| top | average opponent: 1495record: 3-3-1 | new rating: 1502 | ||
| Grand Prix Los Angeles 2009 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 211 | Urbano, Brian (1500) | Lost 1-2 | -181482 |
| 2extended | 262 | Parsinitz, Ralph (1535) | Won 1-0 | +191501 |
| 3extended | 258 | Castaneda, Jesus (1500) | Lost 0-2 | -181483 |
| 4extended | 306 | Snider, Warren (1486) | Lost 0-2 | -181465 |
| 5extended | 328 | Elder, Ryan (1509) | Won 2-1 | +191484 |
| 6extended | 278 | Fausone, Anthony (1417) | Won 2-0 | +171501 |
| 7extended | 212 | Maas, Jared (1500) | Won 2-1 | +181519 |
| 8extended | 134 | Rider, Justin (1624) | Lost 0-2 | -171502 |
| top | average opponent: 1509record: 4-4 | new rating: 1502 | ||