Armstrong, Michael
Current rating: 1359
Record: 21-32
| Grand Prix Las Vegas 2019 (limited) (MH1 limited) | starting rating: 1389 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 172 | Christian, Shaun (1500) | Won 2-0 | +201409 |
| 2sealed | 58 | Gonzales, Tony1653 (1452) | Lost 1-2 | -181391 |
| 3sealed | 512 | Houle, Brandon (1494) | Lost 1-2 | -161375 |
| 4sealed | 487 | Febras, Dylan (1473) | Lost 1-2 | -161359 |
| top | average opponent: 1480record: 1-3 | new rating: 1359 | ||
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1436 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 170 | Muniz, Nate (1525) | Lost 0-2 | -171419 |
| 2modern | 422 | Coutu, Jared (1483) | Lost 0-2 | -171402 |
| 3modern | 721 | Greeson, Kevin (1642) | Lost 0-2 | -131389 |
| top | average opponent: 1550record: 0-3 | new rating: 1389 | ||
| Grand Prix Los Angeles 2018 (M19 standard) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 4 | Hale, Dixon (1503) | Lost 0-2 | -171430 |
| 2standard | 382 | Cox, Andrew (1511) | Won 2-0 | +201450 |
| 3standard | 341 | Graves, Gavin (1422) | Won 2-0 | +171467 |
| 4standard | 322 | Lu, Robert (1599) | Lost 1-2 | -151452 |
| 5standard | 260 | Giddings, Andrew (1561) | Lost 0-2 | -161436 |
| top | average opponent: 1519record: 2-3 | new rating: 1436 | ||
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1437 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 330 | Ingram, Nickolas (1576) | Won 2-0 | +201457 |
| 3modern | 187 | Herren, Josh (1664) | Lost 0-2 | -141443 |
| 4modern | 251 | Van Zee, Will (1475) | Lost 0-2 | -171426 |
| 5modern | 305 | Alvis, Murphy (1505) | Lost 1-2 | -171409 |
| 6modern | 450 | Carlson, Cory (1443) | Won 2-0 | +191428 |
| 7modern | 379 | Taveau, Christopher (1470) | Won 2-0 | +191447 |
| 8modern | 248 | Kienholz, Eric (1452) | Won 2-1 | +181465 |
| 9modern | 187 | Garcia, Jaime (1499) | Lost 0-2 | -181447 |
| top | average opponent: 1511record: 4-4 | new rating: 1447 | ||
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2101 | Eckman, Isaiah (1475) | Lost 0-2 | -171430 |
| 2sealed | 841 | Davis, True (1481) | Won 2-0 | +181448 |
| 3sealed | 885 | Komsky, Stan (1708) | Lost 0-2 | -131435 |
| 4sealed | 883 | Lucas, Amanda (1452) | Won 2-1 | +181453 |
| 5sealed | 552 | McGrayne, Matt (1534) | Lost 0-2 | -161437 |
| top | average opponent: 1530record: 2-3 | new rating: 1437 | ||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 256 | Ingram, Michael (1539) | Lost 1-2 | -151396 |
| 2modern | 489 | Brown, Avrey (1483) | Won 2-0 | +191415 |
| 3modern | 633 | Blackmon, Seth (1498) | Won 2-0 | +201435 |
| 4modern | 501 | Turner, Scott (1438) | Won 2-1 | +181453 |
| 5modern | 335 | Alter, Scott (1864) | Lost 0-2 | -111442 |
| 6modern | 335 | Santos, Connor (1452) | Won 2-1 | +181460 |
| 7modern | 224 | Simms, Jason (1590) | Lost 0-2 | -161444 |
| 8modern | 355 | Sawicki, Sean (1518) | Won 2-1 | +201464 |
| 9modern | 281 | Estrada, Franco (1536) | Lost 0-2 | -171447 |
| top | average opponent: 1546record: 5-4 | new rating: 1447 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 31 | Hess, Greg (1537) | Lost 0-2 | -161429 |
| 2modern | 331 | Strohkirch, Brett (1485) | Won 2-1 | +191448 |
| 3modern | 467 | Grady, Austin (1465) | Lost 0-0 | -181430 |
| 4modern | 564 | Smith, David (1393) | Lost 0-2 | -191411 |
| top | average opponent: 1470record: 1-3 | new rating: 1411 | ||
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1478 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 289 | Hannaman, Nicholas (1500) | Lost 0-2 | -181460 |
| 2sealed | 466 | Cannon, Thomas (1482) | Won 2-1 | +191479 |
| 3sealed | 444 | Kremmer, Millen (1500) | Lost 1-2 | -181461 |
| 4sealed | 543 | Jackson, Deacon (1480) | Won 2-1 | +191480 |
| 5sealed | 371 | Eustice, Bryan (1496) | Lost 0-2 | -181462 |
| 6sealed | 412 | Barker, Brandon (1482) | Won 2-0 | +181480 |
| 7sealed | 334 | Fitzpatrick IV, Frank (1498) | Lost 0-2 | -181462 |
| 8sealed | 325 | Edwards, Clinton (1485) | Lost 0-2 | -171445 |
| top | average opponent: 1490record: 3-5 | new rating: 1445 | ||
| Grand Prix Memphis 1999 (Urza's block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 6 | Howes, Gordon (1447) | Lost 0-0 | -191481 |
| 2block | 104 | Pannell, Thomas (1465) | Lost 0-0 | -181463 |
| 3block | 142 | Williams, Ollie (1464) | Won 0-0 | +181481 |
| 4block | 113 | Young, Deke (1482) | Won 0-0 | +181499 |
| 5block | 80 | George, Brent (1499) | Lost 0-0 | -181481 |
| 6block | 100 | Thomas, Jon (1482) | Won 0-0 | +181499 |
| 7block | 74 | Rodamilans, Enric (1340) | Lost 0-0 | -211478 |
| top | average opponent: 1454record: 3-4 | new rating: 1478 | ||