Mariani, Johnny
Current rating: 1522
Record: 25-20 (GP) / 4-11 (professional)
| Strixhaven Championship (MTGA mixed) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 1historic | 57 | Runyon, David (1635) | Won 2-1 | +201535 |
| 2historic | 19 | Damo da Rosa, Paulo Vitor (2183) | Lost 0-2 | -71528 |
| 3historic | 45 | Vu, Quang (1657) | Won 2-0 | +201548 |
| 4standard | 33 | Miller, Scott (1681) | Lost 1-2 | -161532 |
| 5standard | 46 | Karamchandani, Arya (1566) | Won 2-1 | +191551 |
| 6standard | 45 | Corsi, Simone (1748) | Lost 0-2 | -141537 |
| 7standard | 78 | Brasil Junior, Claudinei (1727) | Lost 0-2 | -151522 |
| top | average opponent: 1742record: 3-4 | new rating: 1522 | ||
| Grand Prix Montreal 2015 (DTK limited) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 38 | Bishop, Eric (1451) | Won 2-0 | +181506 |
| 4sealed | 58 | Flett, Evan (1469) | Won 2-0 | +171523 |
| 5sealed | 11 | Dixon, Robert (1652) | Lost 0-2 | -161507 |
| 6sealed | 132 | Chin, Ricky (1506) | Won 2-0 | +181525 |
| 7sealed | 93 | Duke, Reid (1894) | Lost 1-2 | -111514 |
| 8sealed | 95 | Lachance, Marc-Antoine (1535) | Won 2-0 | +181532 |
| 9sealed | 69 | Chin, Steve (1590) | Lost 0-2 | -171515 |
| top | average opponent: 1585record: 4-3 | new rating: 1515 | ||
| Pro Tour Fate Reforged (modern) | starting rating: 1582 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 195 | Mann, Stephen (1923) | Lost 0-2 | -121570 |
| 2draft | 100 | Nielsen, Simon (1598) | Lost 0-2 | -171553 |
| 3draft | 180 | Jesse, Zachary (2002) | Lost 0-2 | -111542 |
| 4modern | 187 | Izumi, Hikaru (1505) | Lost 1-2 | -181524 |
| 5modern | 201 | Frisk, Mikko (1494) | Lost 1-2 | -191505 |
| 6modern | 198 | Lu, Liguo (1516) | Won 2-0 | +181523 |
| 7modern | 186 | Sologuren, David (1610) | Lost 1-2 | -161507 |
| 8modern | 174 | Flynn, Ryan (1470) | Lost 0-2 | -191488 |
| top | average opponent: 1640record: 1-7 | new rating: 1488 | ||
| Grand Prix Ottawa 2014 (KTK limited) | starting rating: 1607 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 89 | Leblanc, Hugo (1503) | Lost 1-2 | -201587 |
| 4sealed | 389 | Vidal-Lessard, Thomas (1464) | Won 2-1 | +161603 |
| 5sealed | 178 | Tucker, Jeff (1658) | Lost 0-2 | -171586 |
| 6sealed | 266 | Sher, Adam (1518) | Lost 1-2 | -191567 |
| 7sealed | 283 | Irons, Bill (1506) | Won 2-0 | +161583 |
| 8sealed | 198 | Plouffe, Jeremi (1605) | Lost 0-2 | -171566 |
| 9sealed | 192 | Chan, Calvin (1478) | Won 2-0 | +161582 |
| top | average opponent: 1533record: 3-4 | new rating: 1582 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 152 | Bremner, John (1529) | Won 2-0 | +181520 |
| 4sealed | 119 | Angers Ruest, Marc (1553) | Lost 1-2 | -171503 |
| 5sealed | 202 | Rowe, Jonathan (1780) | Lost 1-2 | -131490 |
| 6sealed | 394 | Gareau, Philippe (1644) | Won 2-0 | +211511 |
| 7sealed | 66 | Allegrucci, Xavier (1509) | Won 2-0 | +181529 |
| 8sealed | 170 | Darlow, Ari (1552) | Won 2-0 | +181547 |
| 9sealed | 73 | Brown, Max (1757) | Won 2-0 | +221569 |
| 10draft | 979 | Wong, David K (1630) | Lost 0-2 | -171552 |
| 11draft | 938 | Paquin, Sebastien (1596) | Won 2-1 | +191571 |
| 12draft | 971 | Couture, Jean-Philippe (1573) | Won 2-0 | +181589 |
| 13draft | 946 | Priemer, Tyler (1616) | Won 2-0 | +181607 |
| 14draft | 913 | Danilkow, Alex (1623) | Lost 1-2 | -171590 |
| 15draft | 938 | Miller, Matthew (1549) | Won 2-0 | +171607 |
| top | average opponent: 1609record: 9-4 | new rating: 1607 | ||
| Grand Prix Toronto 2013 (THS limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 440 | Hoel, Jeremy (1503) | Won 2-0 | +191500 |
| 2sealed | 177 | Cusimano, Anthony (1518) | Won 2-1 | +181518 |
| 3sealed | 285 | Hattwick, Nicholas (1575) | Lost 1-2 | -171501 |
| 4sealed | 417 | McBride, Kallahan (1518) | Won 2-0 | +181519 |
| 5sealed | 247 | Jenkins, Chad (1525) | Lost 1-2 | -181501 |
| 6sealed | 286 | Burton, Frank (1501) | Lost 0-2 | -181483 |
| 7sealed | 372 | Watteyne, Michel (1484) | Lost 0-2 | -181465 |
| 8sealed | 290 | Norgren, Andrew (1480) | Won 2-0 | +191484 |
| 9sealed | 222 | Bradshaw, Paul (1499) | Won 2-0 | +181502 |
| top | average opponent: 1511record: 5-4 | new rating: 1502 | ||
| Grand Prix Montreal 2011 (M12 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 375 | Cunningham, Amanda (1500) | Lost 0-2 | -181482 |
| 2sealed | 550 | Evans, Sean (1517) | Won 2-1 | +191501 |
| 3sealed | 463 | Ciarroni, Steven (1520) | Lost 0-2 | -181483 |
| 4sealed | 518 | Wilson, Karen (1484) | Won 2-1 | +181501 |
| 5sealed | 491 | Woodruff, Danny (1467) | Won 2-0 | +171518 |
| 6sealed | 477 | Mallin, Tom (1488) | Lost 1-2 | -181500 |
| 7sealed | 473 | Inda, Joshua (1490) | Lost 0-2 | -181482 |
| 8sealed | 465 | Carpentier, Simon (1482) | Won 2-0 | +181500 |
| 9sealed | 440 | Mason, Jesse S (1469) | Lost 1-2 | -191481 |
| top | average opponent: 1491record: 4-5 | new rating: 1481 | ||