Osso, Stephen
Current rating: 1550
Record: 40-42-3
Grand Prix Washington DC 2010Grand Prix Toronto 2010Grand Prix Montreal 2011Grand Prix Baltimore 2012Grand Prix Boston-Worcester 2012Grand Prix Atlantic City 2013Grand Prix Philadelphia 2014Grand Prix New Jersey 2014Grand Prix Baltimore 2014Grand Prix Atlantic City 2015Grand Prix Richmond 2017Grand Prix Las Vegas 2017 (limited)
| Grand Prix Las Vegas 2017 (limited) (AKH limited) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 606 | Pepper, Lindsay (1423) | Won 2-0 | +161550 |
| 2sealed | 157 | Tatum, Joseph (1540) | Lost 0-2 | -181532 |
| 3sealed | 871 | Edelman, Charles (1616) | Lost 1-2 | -161516 |
| 4sealed | 949 | Rogers, Dane (1479) | Won 2-1 | +171533 |
| 5sealed | 787 | Al Oqab, Saleh (1482) | Won 2-0 | +171550 |
| 6sealed | 636 | Withers, Matthew (1474) | Won 2-0 | +171567 |
| 7sealed | 474 | Johnson, Ian (1641) | Won 2-0 | +191586 |
| 8sealed | 243 | Appler, Mikael (1564) | Won 2-1 | +181604 |
| 9sealed | 2114 | Elkins, Brandon (1596) | Lost 1-2 | -191585 |
| 10draft | 230 | Opferman, Anthony (1533) | Lost 0-2 | -181567 |
| 11draft | 64 | Becerra Reyes, Daniel (1635) | Lost 1-2 | -171550 |
| top | average opponent: 1544record: 6-5 | new rating: 1550 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1438 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 286 | Lillibridge, Forrest (1500) | Won 2-0 | +191457 |
| 2sealed | 282 | Lewis, Samuel (1456) | Won 2-0 | +181475 |
| 3sealed | 302 | Loebel, Daniel (1339) | Won 2-0 | +161491 |
| 4sealed | 117 | Holcomb, John (1477) | Won 2-0 | +181509 |
| 5sealed | 40 | Genna, Peter (1452) | Lost 0-2 | -191490 |
| 6sealed | 106 | Ross, Tom (1996) | Lost 1-2 | -101480 |
| 7sealed | 290 | McClure, Micheal (1614) | Won 2-0 | +201500 |
| 8sealed | 185 | Williams, Parker (1562) | Won 2-0 | +201520 |
| 9sealed | 91 | Centrella, Anthony (1585) | Won 2-1 | +191539 |
| 10draft | 685 | Lovin, Mark (1755) | Lost 0-2 | -141525 |
| 11draft | 760 | Nerem, Perry (1584) | Lost 0-2 | -171508 |
| 13draft | 766 | Denmead, Grant (1778) | Won 2-1 | +231531 |
| 14draft | 704 | Rocus, Andy (1529) | Lost 1-2 | -181513 |
| 15draft | 729 | Ostroski, Michael (1727) | Won 2-1 | +211534 |
| top | average opponent: 1597record: 9-5 | new rating: 1534 | ||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 312 | Averell, David (1618) | Lost 1-2 | -161454 |
| 3sealed | 461 | Spellman, Bryan (1522) | Lost 0-2 | -161438 |
| 4sealed | 687 | Richter, Matthew (1431) | Won 2-0 | +181456 |
| 5sealed | 441 | Yaman, Robert (1487) | Lost 1-2 | -181438 |
| top | average opponent: 1515record: 1-3 | new rating: 1438 | ||
| Grand Prix Baltimore 2014 (KTK limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 28 | Mu, Matt (1529) | Lost 0-2 | -171504 |
| 3sealed | 313 | Rumski, Zac (1633) | Lost 1-2 | -161488 |
| 4sealed | 494 | Williams, Todd (1481) | Lost 1-2 | -181470 |
| top | average opponent: 1547record: 0-3 | new rating: 1470 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 906 | Lavoie, Alex (1550) | Draw 1-1 | +21455 |
| 3legacy | 984 | Chapin, Sam (1474) | Won 2-0 | +181473 |
| 4legacy | 839 | Wilson, Jacob (2005) | Won 2-0 | +271500 |
| 5legacy | 623 | Armstrong, Corey (1471) | Won 2-0 | +171517 |
| 6legacy | 588 | Gallen, Derek (1591) | Won 2-0 | +201537 |
| 7legacy | 569 | Morrow, Andrew (1572) | Won 2-0 | +181555 |
| 8legacy | 562 | Phillips, Bert (1646) | Lost 1-2 | -161539 |
| 9legacy | 584 | Douglas, Adam (1562) | Lost 1-2 | -181521 |
| top | average opponent: 1609record: 5-2-1 | new rating: 1521 | ||
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1443 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 308 | King, Evan (1451) | Won 2-0 | +181461 |
| 2sealed | 453 | Fisher, Sam (1518) | Won 2-0 | +201481 |
| 3sealed | 14 | Ritrovato, Ryan (1535) | Lost 0-2 | -171464 |
| 4sealed | 465 | Lane, Mikael (1619) | Lost 1-2 | -161448 |
| 5sealed | 408 | Gunter, Cody (1503) | Won 2-0 | +191467 |
| 6sealed | 303 | Gottlieb, Justin (1670) | Lost 0-2 | -141453 |
| top | average opponent: 1549record: 3-3 | new rating: 1453 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 165 | Allen, Garrett (1518) | Lost 0-2 | -171438 |
| 3standard | 430 | Badillo, Rogelio (1526) | Won 2-0 | +191457 |
| 4standard | 447 | Manzano, Ox (1569) | Lost 1-2 | -161441 |
| 5standard | 564 | Alvarado, Miguel (1491) | Won 2-0 | +191460 |
| 6standard | 260 | cloutier, jack (1522) | Lost 0-2 | -171443 |
| top | average opponent: 1525record: 2-3 | new rating: 1443 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 26 | Berk, Bradley (1586) | Lost 0-2 | -161467 |
| 5sealed | 315 | Bregoli, Mike (1663) | Won 2-0 | +211488 |
| 6sealed | 238 | Chapman, Ben (1562) | Lost 0-2 | -161472 |
| 7sealed | 304 | Ocampo, Christopher (1516) | Lost 0-2 | -171455 |
| top | average opponent: 1582record: 1-3 | new rating: 1455 | ||
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 384 | Chance, Karl D (1502) | Lost 0-2 | -191499 |
| 3standard | 381 | Reynolds, Nicholas (1552) | Won 2-1 | +191518 |
| 4standard | 496 | Marini, Cory (1518) | Won 2-0 | +181536 |
| 5standard | 135 | Stroh, Brian (1602) | Lost 1-2 | -161520 |
| 6standard | 384 | Petropoulos, Anthony (1502) | Lost 1-2 | -191501 |
| 7standard | 380 | Farley, Jessica (1484) | Lost 1-2 | -181483 |
| top | average opponent: 1527record: 2-4 | new rating: 1483 | ||
| Grand Prix Montreal 2011 (M12 limited) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 156 | Hill, Shawn (1500) | Won 2-0 | +181516 |
| 2sealed | 95 | Lebeau, Jonathan (1518) | Won 2-0 | +181534 |
| 3sealed | 19 | Gregoire, Alex (1536) | Lost 0-2 | -181516 |
| 4sealed | 156 | Giannopoulos, Steve (1510) | Won 2-0 | +181534 |
| 5sealed | 48 | Duncan, Kyle A (1484) | Lost 1-2 | -191515 |
| 6sealed | 86 | Lazaro, Andrew (1508) | Lost 1-2 | -181497 |
| 7sealed | 133 | Tenney, Thomas A (1603) | Won 2-1 | +201517 |
| 8sealed | 101 | Gade, Brandon (1562) | Lost 1-2 | -171500 |
| 9sealed | 98 | Marchi, Jonathan (1500) | Won 2-1 | +181518 |
| top | average opponent: 1525record: 5-4 | new rating: 1518 | ||
| Grand Prix Toronto 2010 (SOM limited) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 136 | Wilkins, Josh (1500) | Won 2-0 | +181510 |
| 2sealed | 163 | Pickett, Alastair (1519) | Draw 1-1 | 01510 |
| 3sealed | 105 | Somerville, Tate (1517) | Won 2-0 | +181528 |
| 4sealed | 77 | Vyas, James (1553) | Lost 1-2 | -181510 |
| 5sealed | 138 | Benes, John (1520) | Won 2-0 | +191529 |
| 6sealed | 89 | Daimee, Al (1536) | Won 2-0 | +181547 |
| 7sealed | 58 | Wescoe, Craig (1803) | Lost 1-2 | -141533 |
| 8sealed | 91 | Zell, Susan (1571) | Lost 1-2 | -171516 |
| 9sealed | 73 | Slaton, Hunter (1518) | Lost 1-2 | -181498 |
| top | average opponent: 1560record: 4-4-1 | new rating: 1498 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 660 | Cox, Patrick (1873) | Lost 1-2 | -111489 |
| 5standard | 780 | McGrath, Colin (1507) | Lost 0-2 | -181471 |
| 6standard | 762 | Lacy, Ben J (1516) | Won 2-0 | +191490 |
| 7standard | 753 | Whitten, Adam (1502) | Lost 0-2 | -181472 |
| 8standard | 741 | Romanoff, Nathan (1518) | Won 2-1 | +191491 |
| 9standard | 703 | Bartlett, Nicholas T (1534) | Draw 1-1 | +11492 |
| top | average opponent: 1575record: 2-3-1 | new rating: 1492 | ||