Piotrowsky, Michael
Current rating: 1475
Record: 11-15
| Grand Prix Washington DC 2019 (MH1 limited) | starting rating: 1419 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 53 | Ragusa, Christopher (1531) | Won 2-0 | +201439 |
| 2sealed | 212 | Miles-Wagner, Brent (1580) | Lost 0-0 | -161423 |
| 3sealed | 406 | Cates, Weston (1590) | Won 2-0 | +211444 |
| 4sealed | 247 | Troth, John (1395) | Won 2-1 | +171461 |
| 5sealed | 175 | Fiorilli, Michael (1489) | Won 2-1 | +191480 |
| 6sealed | 151 | Kipple, Sean (1737) | Won 2-1 | +231503 |
| 7sealed | 44 | McDougal, Shaun (1564) | Lost 1-2 | -171486 |
| 8sealed | 76 | Orange, Gregory (1916) | Lost 0-2 | -111475 |
| top | average opponent: 1600record: 5-3 | new rating: 1475 | ||
| Grand Prix Atlanta 2018 (modern) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 347 | Pabon, Omar (1500) | Lost 0-2 | -171430 |
| 2modern | 507 | Beckman, John (1483) | Lost 1-2 | -171413 |
| 3modern | 652 | Jones, Matthew 7589 (1464) | Lost 1-2 | -171396 |
| 4modern | 728 | Gibbons, Jayson (1448) | Won 2-0 | +191415 |
| 5modern | 647 | Whitehead, Chad (1465) | Lost 0-2 | -171398 |
| 6modern | 587 | Davis, Charles (1422) | Won 2-1 | +181416 |
| 7modern | 482 | Zevallos, Shaina (1469) | Lost 1-2 | -171399 |
| 8modern | 403 | Thompson, Nathan (1476) | Won 2-1 | +201419 |
| top | average opponent: 1466record: 3-5 | new rating: 1419 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1433 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 237 | Willoughby, Tyler (1500) | Lost 1-2 | -171416 |
| 2modern | 544 | Fensler, Riley (1481) | Won 2-1 | +201436 |
| 3modern | 491 | Xie, Da (1560) | Won 2-1 | +201456 |
| 4modern | 329 | Yurchick, Adam (1928) | Lost 1-2 | -101446 |
| 5modern | 468 | Vance, Kameron (1468) | Lost 1-2 | -181428 |
| 6modern | 489 | Barron, Michael (1478) | Won 2-0 | +191447 |
| top | average opponent: 1569record: 3-3 | new rating: 1447 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 698 | Gamble, Eddie (1698) | Lost 0-2 | -141486 |
| 5sealed | 874 | Shrader, Lance (1591) | Lost 0-2 | -171469 |
| 6sealed | 849 | Holland, Brad (1504) | Lost 0-2 | -171452 |
| 7sealed | 938 | Kuryl-Champine, Brock (1404) | Lost 0-2 | -191433 |
| top | average opponent: 1549record: 0-4 | new rating: 1433 | ||