Petroski, Michael
Current rating: 1570
Record: 31-33
| Grand Prix Milwaukee 2018 (GRN standard) | starting rating: 1545 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 112 | Zheng, Lifan (1500) | Lost 0-2 | -191526 |
| 3standard | 358 | Schultz, Steven (1500) | Won 2-0 | +181544 |
| 4standard | 391 | Anderson, Glenn (1447) | Won 2-0 | +161560 |
| 5standard | 258 | Zhou, Martin (1653) | Lost 1-2 | -161544 |
| 6standard | 330 | Barber, Ian (1974) | Won 2-1 | +251569 |
| 7standard | 143 | Andersen, Christoffer (1798) | Won 2-0 | +221591 |
| 8standard | 104 | Faley, Joe (1557) | Won 2-0 | +181609 |
| 9standard | 124 | Branham, Andrew (1575) | Lost 0-2 | -191590 |
| 10standard | 122 | Williams, Caleb (1658) | Won 2-1 | +191609 |
| 11standard | 61 | Michel, Gregory (1971) | Lost 1-2 | -111598 |
| 12standard | 101 | Ziggas, Andrew (1694) | Lost 1-2 | -171581 |
| 13standard | 99 | Bond, Matthew (1753) | Won 2-1 | +211602 |
| 14standard | 80 | McDermott, John (1713) | Lost 1-2 | -161586 |
| 15standard | 88 | Roti Roti, Joseph (1644) | Lost 1-2 | -161570 |
| top | average opponent: 1674record: 7-7 | new rating: 1570 | ||
| Grand Prix Richmond 2018 (std) (M19 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 59 | Neenan, Baker (1533) | Won 2-0 | +191519 |
| 3standard | 96 | Bertelsen, Erik (1708) | Lost 0-2 | -151504 |
| 4standard | 145 | Zhou, Zirui (1802) | Lost 0-2 | -121492 |
| 5standard | 203 | Marino, Lee (1868) | Won 2-0 | +241516 |
| 6standard | 223 | Sullivan, Cameron (1712) | Won 2-1 | +221538 |
| 7standard | 97 | Vizaro, Justin (1686) | Won 2-0 | +201558 |
| 8standard | 127 | Shenhar, Shahar (1834) | Lost 1-2 | -131545 |
| top | average opponent: 1735record: 4-3 | new rating: 1545 | ||
| Grand Prix Richmond 2018 (leg) (legacy) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 20 | Chen, Chung-Jen (1501) | Won 2-0 | +191486 |
| 3legacy | 193 | Boyd, David (1539) | Lost 0-2 | -171469 |
| 4legacy | 157 | Ginsberg, Oren (1502) | Won 2-0 | +181487 |
| 5legacy | 68 | Wong, Ben (1690) | Won 2-0 | +221509 |
| 6legacy | 110 | Hinkle, Charles (1803) | Won 2-1 | +231532 |
| 7legacy | 66 | Sworts, Landon (1585) | Lost 0-2 | -171515 |
| 8legacy | 75 | Long, David (1684) | Lost 0-2 | -151500 |
| top | average opponent: 1615record: 4-3 | new rating: 1500 | ||
| Grand Prix Minneapolis 2018 (M19 limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 211 | Meyer, Jeremy (1486) | Won 2-0 | +171535 |
| 3sealed | 288 | Bruni, Dante (1631) | Lost 0-2 | -161519 |
| 4sealed | 238 | Johnson, Andrew (1449) | Lost 0-2 | -191500 |
| 5sealed | 465 | Gleich, Connor (1463) | Won 2-0 | +171517 |
| 6sealed | 397 | Gascoyne, Evan (1636) | Lost 0-2 | -161501 |
| 7sealed | 353 | Feigel, Christina (1494) | Lost 1-2 | -181483 |
| 8sealed | 289 | Clausen, Joe (1609) | Lost 1-2 | -161467 |
| top | average opponent: 1538record: 2-5 | new rating: 1467 | ||
| Grand Prix Indianapolis 2017 (HOU limited) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 230 | Findley, Michael (1482) | Won 2-0 | +181534 |
| 2sealed | 141 | Stephens, Taylor (1516) | Won 2-1 | +171551 |
| 3sealed | 238 | McNeal, Ben (1535) | Won 2-0 | +181569 |
| 4sealed | 100 | League, Charles (1906) | Won 2-0 | +241593 |
| 5sealed | 35 | Bauer, Douglas (1703) | Lost 0-2 | -161577 |
| 6sealed | 63 | Fabiano, Gerard (2024) | Lost 0-2 | -101567 |
| 7sealed | 137 | Mast, Anthony (1539) | Lost 0-2 | -191548 |
| 8sealed | 284 | Soorani, Shaheen (1861) | Lost 1-2 | -121536 |
| 9sealed | 274 | Wadsworth, Jared (1539) | Lost 1-2 | -181518 |
| top | average opponent: 1678record: 4-5 | new rating: 1518 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 143 | Phan, Pierre (1481) | Won 2-0 | +181524 |
| 2sealed | 275 | Gellis, Dylan (1520) | Lost 0-2 | -181506 |
| 3sealed | 575 | Wasilewski, Rafael (1502) | Won 2-1 | +181524 |
| 4sealed | 256 | Henry, Clayton (1516) | Lost 1-2 | -191505 |
| 5sealed | 406 | Snead, Chris (1454) | Won 2-1 | +171522 |
| 6sealed | 355 | Kearney, Dale (1403) | Won 2-1 | +161538 |
| 7sealed | 161 | Sato, Yugo (1510) | Lost 0-2 | -181520 |
| 8sealed | 317 | Estell, Brock (1610) | Won 2-0 | +191539 |
| 9sealed | 311 | Ashton, Thomas (1974) | Won 2-0 | +261565 |
| 10draft | 644 | Simon, Michael (1661) | Lost 0-2 | -161549 |
| 11draft | 642 | Byer, Jon (1637) | Won 2-1 | +191568 |
| 12draft | 642 | Bossen, Matt (1650) | Lost 1-2 | -161552 |
| 13draft | 648 | Miller, Jason A (1672) | Lost 0-2 | -161536 |
| 15draft | 706 | Schantz, Mathew (1444) | Lost 0-2 | -201516 |
| top | average opponent: 1574record: 7-7 | new rating: 1516 | ||
| Grand Prix Madison 2015 (BFZ limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 67 | Kiel, Lars (1500) | Won 2-1 | +181518 |
| 2sealed | 105 | Muehlenthaler, Kyle (1514) | Won 2-0 | +181536 |
| 3sealed | 66 | Wu, Dalton (1640) | Won 2-0 | +201556 |
| 4sealed | 71 | Chen, Shan Chun (1772) | Lost 0-2 | -141542 |
| 5sealed | 125 | Podruch, Mick (1544) | Lost 1-2 | -181524 |
| 6sealed | 344 | Jerrard, Zach (1544) | Lost 0-2 | -181506 |
| top | average opponent: 1585record: 3-3 | new rating: 1506 | ||