Armstrong, Herman
Current rating: 1662
Record: 28-25-2 (GP) / 9-5-2 (professional)
| Grand Prix Dallas-Fort Worth 2018 (DOM limited) | starting rating: 1651 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 263 | Payne, Thomas (1500) | Won 2-0 | +151666 |
| 2sealed | 25 | Zhang, Bo [USA] (1593) | Lost 1-2 | -191647 |
| 3sealed | 275 | Robicheaux, Brandon (1519) | Won 2-0 | +151662 |
| 4sealed | 260 | Ybarra, Vincent (1491) | Won 2-1 | +151677 |
| 5sealed | 76 | Horstkamp, Timothy (1535) | Won 2-0 | +161693 |
| 6sealed | 88 | Ingram, Jesse (1593) | Lost 0-2 | -201673 |
| 7sealed | 194 | Hayne, Alexander (2067) | Lost 0-2 | -111662 |
| top | average opponent: 1614record: 4-3 | new rating: 1662 | ||
| Grand Prix Houston 2013 (DGM limited) | starting rating: 1695 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 340 | Black, Adam (1428) | Lost 1-2 | -231672 |
| 2sealed | 268 | Chen, Daniel (1482) | Lost 1-2 | -211651 |
| top | average opponent: 1455record: 0-2 | new rating: 1651 | ||
| Grand Prix San Antonio 2012 (RTR standard) | starting rating: 1617 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 191 | Matthews, Odos (1569) | Won 2-1 | +171634 |
| 2standard | 182 | Heiser, Doug (1518) | Lost 1-2 | -201614 |
| 3standard | 274 | Guerrero, Tony Lee (1504) | Won 2-0 | +161630 |
| 4standard | 133 | Pearce, Drew (1503) | Won 2-0 | +151645 |
| 5standard | 78 | Tabor, Matthew (1502) | Lost 1-2 | -201625 |
| 6standard | 181 | Steiner, Casey (1584) | Won 2-1 | +171642 |
| 7standard | 125 | Puhl, Robert (1536) | Won 2-1 | +161658 |
| 8standard | 108 | Poff, Chris (1688) | Won 2-1 | +191677 |
| 9standard | 37 | Thompson, Walker (1569) | Won 2-1 | +161693 |
| 10standard | 25 | Bruce, Steven (1583) | Won 2-1 | +161709 |
| 11standard | 23 | Duke, Reid (2042) | Lost 1-2 | -121697 |
| 12standard | 26 | Turtenwald, Owen (1884) | Lost 1-2 | -151682 |
| 13standard | 42 | McKenzie, Chadwick (1610) | Lost 1-2 | -191663 |
| 14standard | 49 | Castro, Franc (1569) | Won 2-0 | +161679 |
| 15standard | 44 | Page, William (1575) | Won 2-1 | +161695 |
| top | average opponent: 1616record: 10-5 | new rating: 1695 | ||
| Grand Prix Dallas 2007 (extended) | starting rating: 1618 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 11 | Carroll, Brendan (1518) | Won 0-0 | +161634 |
| 4extended | 79 | Leais, Chase (1553) | Won 2-1 | +161650 |
| 5extended | 25 | Tormos, Ervin (1908) | Lost 1-2 | -131637 |
| 6extended | 47 | Nguyen, Tuan (1507) | Lost 0-2 | -201617 |
| top | average opponent: 1622record: 2-2 | new rating: 1617 | ||
| Pro Tour Columbus 2004 (extended) | starting rating: 1494 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 73 | Rood, David (1887) | Draw 1-1 | +71501 |
| 2extended | 72 | Sonne, Jonathan (2011) | Lost 0-2 | -101491 |
| 3extended | 107 | Oppliger, Daniel (1590) | Won 2-0 | +201511 |
| 4extended | 72 | Goldman, Matt (1555) | Won 2-0 | +191530 |
| 5extended | 45 | Buchanan, Donald (1525) | Won 2-1 | +181548 |
| 6extended | 27 | Bakke, Harald (1539) | Won 2-1 | +181566 |
| 7extended | 17 | Nuijten, Julien (1956) | Won 2-1 | +241590 |
| 8extended | 9 | Cornelissen, Kamiel (2096) | Won 2-1 | +271617 |
| 9extended | 5 | Oiso, Masashi (2005) | Lost 0-2 | -111606 |
| 10extended | 12 | Hayrynen, Andrei (1746) | Lost 0-2 | -161590 |
| 11extended | 24 | Hoeh, Hans Joachim (1753) | Lost 0-2 | -151575 |
| 12extended | 33 | Ikeda, Tsuyoshi (1811) | Won 2-1 | +221597 |
| 13extended | 26 | Gil, Guillem (1557) | Won 2-1 | +181615 |
| 14extended | 18 | McGee, Michael (1664) | Won 2-0 | +181633 |
| 15extended | 12 | Warmenhoven, Ruud (1778) | Lost 1-2 | -151618 |
| 16extended | 19 | Dushkevich, Artem (1599) | Draw 1-1 | 01618 |
| top | average opponent: 1754record: 9-5-2 | new rating: 1618 | ||
| Grand Prix Austin 2004 (COK limited) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 55 | Roman, Ed (1624) | Draw 1-1 | +31472 |
| 3sealed | 54 | McFarland, Johnathan (1518) | Won 2-0 | +191491 |
| 4sealed | 55 | Karasoulis, Mikhail (1452) | Lost 0-2 | -191472 |
| 5sealed | 85 | Rogers, Dennis (1518) | Won 2-0 | +191491 |
| 6sealed | 54 | Smart, Jason (1536) | Lost 0-2 | -171474 |
| 7sealed | 78 | Delfino, Dio Alexander (1550) | Draw 1-1 | +11475 |
| 8sealed | 70 | LaRose, Kerry (1516) | Won 2-0 | +191494 |
| top | average opponent: 1531record: 3-2-2 | new rating: 1494 | ||
| Grand Prix Dallas 2000 (INV limited) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 55 | Kinney, Chris (1500) | Won 2-0 | +181504 |
| 2sealed | 29 | Glaze, Jeff (1500) | Lost 0-2 | -181486 |
| 3sealed | 70 | Liston, Beth (1504) | Lost 0-2 | -171469 |
| 4sealed | 125 | Defenbaugh, John (1483) | Won 2-0 | +181487 |
| 5sealed | 107 | Marshall, Scott (1500) | Lost 0-2 | -181469 |
| top | average opponent: 1497record: 2-3 | new rating: 1469 | ||
| Grand Prix Memphis 1999 (Urza's block) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 4 | Otwell, Christopher (1519) | Lost 0-0 | -181485 |
| 3block | 66 | Clinkenbeard, Adam (1516) | Won 0-0 | +191504 |
| 4block | 47 | Franks, Zach (1500) | Lost 0-0 | -181486 |
| 5block | 79 | Lambert, Ken (1501) | Won 0-0 | +181504 |
| 6block | 52 | Karthauser, Zach (1502) | Lost 0-0 | -181486 |
| top | average opponent: 1508record: 2-3 | new rating: 1486 | ||
| Grand Prix Kansas City 1999 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3extended | 23 | Noland, Donald (1471) | Won 0-0 | +171517 |
| 4extended | 45 | Herron, Devon (1518) | Lost 0-0 | -181499 |
| 5extended | 69 | Kretzer, Greg (1518) | Won 0-0 | +191518 |
| 6extended | 33 | Clinkenbeard, Adam (1535) | Won 0-0 | +181536 |
| 7extended | 16 | DuShane, Craig (1489) | Lost 0-0 | -191517 |
| 8extended | 21 | Kastle, Darwin (1690) | Lost 0-0 | -151502 |
| 9extended | 28 | Vulgamore, Jarrod (1520) | Won 2-0 | +191521 |
| 10extended | 27 | Waldbauer, Mitchell (1535) | Lost 0-0 | -181503 |
| 11extended | 25 | Grandon, Dan (1497) | Won 0-0 | +181521 |
| 12extended | 21 | Paschover, Marc (1531) | Lost 0-0 | -181503 |
| top | average opponent: 1530record: 5-5 | new rating: 1503 | ||