| | ✓ OldLady | 203° | 65%+ | 7,070 | 3,154 | 21,820 | 74,294 | #3707602 | | Atlanta | |
| ✓ okthen | 105° | | 3,493 | 1,457 | 20,682 | 3,019 | #3685075 | | Chicago | |
| ✓ OuchMyBalls | 255° | 75%+ | 5,003 | 2,919 | 20,660 | 117,003 | #3811085 | | Amsterdam | |
| ✓ omnivore | 209° | 75%+ | 2,795 | 1,491 | 10,888 | 132,884 | #3810734 | | Atlanta | |
| ✓ Osy | 135° | 75%+ | 1,945 | 1,017 | 9,363 | 7,358 | #3810341 | | New York | |
| ✓ Oink Oink | 169° | 55%+ | 1,216 | 718 | 8,957 | 71,635 | #3812170 | | San Francisco | |
| ✓ Ok I'm A Bot | 122° | 75%+ | 3,678 | 2,051 | 8,535 | 48,104 | #3350290 | | Seattle | |
| ✓ OD GOD | 172° | 75%+ | 160 | 101 | 8,291 | 10,423 | #3786116 | | Chicago-3 | |
| ✓ omar | 218° | 75%+ | 1,651 | 813 | 8,275 | 66,843 | #3405670 | | Chicago | |
| ✓ ooo | 360° | 75%+ | 2,619 | 1,220 | 7,803 | 134,209 | #3206817 | | Dallas | |
| ✓ Overkill | 119° | 65%+ | 819 | 463 | 7,036 | 38,237 | #3782798 | | Chicago-3 | |
| ✓ Odrevan! | 158° | 65%+ | 2,139 | 879 | 6,966 | 106,108 | #2482180 | | London | |
| ✓ OnlyOneNut | 55° | 55%+ | 685 | 397 | 6,719 | 20,145 | #3812194 | | San Francisco | |
| ✓ Obala | 218° | 55%+ | 1,824 | 817 | 6,298 | 98,040 | #3709949 | | New York | |
| ✓ o o l e r | 189° | | 1,500 | 972 | 6,135 | 90,046 | #3771226 | | New York | |
| ✓ obama. | 111° | 75%+ | 1,193 | 472 | 5,712 | 19,739 | #3343875 | | Chicago | |
| ✓ oh_snap! | 169° | | 427 | 127 | 5,647 | 275 | #3426986 | | Chicago | |
| ✓ Ok l'm A Bot | 115° | 75%+ | 2,543 | 1,371 | 5,592 | 36,828 | #3287864 | | Dallas | |
| ✓ Orc | 78° | | 1,023 | 322 | 5,453 | 0 | #2857183 | | Sydney | |
| ✓ o_O | 133° | 55%+ | 1,401 | 836 | 5,104 | 54,028 | #3801748 | | San Francisco | |
| ✓ Oblong | 214° | 55%+ | 1,118 | 720 | 4,607 | 73,918 | #3785871 | | Chicago | |
| ✓ Oddball | 149° | 55%+ | 1,157 | 708 | 4,548 | 75,237 | #3811823 | | New York | |
| ✓ osl | 140° | 75%+ | 1,631 | 846 | 4,391 | 1,131 | #2529700 | | New York | |
| ✓ OEOEOEOEOEOE | | | 1,508 | 662 | 4,089 | 0 | #2757031 | | London | |
| ✓ Orange Soda | 192° | 65%+ | 994 | 591 | 3,909 | 62,470 | #3685998 | | Chicago-3 | |
| ✓ OverlordTaco | 193° | | 1,191 | 657 | 3,904 | 68,983 | #3131140 | | Dallas | |
| ✓ ONtheBALL | 93° | | 796 | 386 | 3,892 | 35,419 | #3703838 | | Chicago-2 | |
| ✓ Olive | 172° | 55%+ | 1,332 | 611 | 3,869 | 73,223 | #3671622 | | San Francisco | |
| ✓ Owen | 83° | 75%+ | 1,220 | 582 | 3,842 | 12,180 | #3600838 | | New York | |
| ✓ One | 137° | 65%+ | 831 | 346 | 3,796 | 0 | #1765361 | | Diameter | |
| ✓ Odd | 126° | | 1,026 | 464 | 3,778 | 6,248 | #3804478 | | Toronto | |
| ✓ ohh | 121° | 75%+ | 850 | 610 | 3,740 | 61,568 | #3645532 | | San Francisco | |
| ✓ OldSaggyLady | 140° | 75%+ | 1,142 | 432 | 3,504 | 17,703 | #1275543 | | Radius | |
| ✓ officer dan | 73° | | 680 | 295 | 3,261 | 11,153 | #3564788 | | Toronto | |
| ✓ ooo killem | 101° | | 325 | 157 | 3,254 | 160 | #3526314 | | Las Vegas | |
| ✓ omni | 231° | 75%+ | 528 | 350 | 3,027 | 28,939 | #3812027 | | Atlanta | |
| ✓ Off Constant | 262° | 55%+ | 563 | 288 | 2,959 | 31,828 | #3806671 | | Chicago-5 | |
| ✓ OT_Baller | 121° | | 487 | 284 | 2,644 | 30,124 | #3498605 | | Dallas | |
| ✓ Oh No! | 187° | | 732 | 251 | 2,639 | 38,094 | #3570327 | | New York | |
| ✓ OG Nasty | 133° | 65%+ | 832 | 443 | 2,592 | 47,638 | #3594247 | | New York | |
| ✓ Oddball7 | 77° | | 409 | 128 | 2,583 | 0 | #843071 | | Centra | |
| ✓ Outis | 210° | 65%+ | 477 | 157 | 2,578 | 24,055 | #1789742 | | Radius | |
| ✓ o high o | 86° | | 1,008 | 558 | 2,571 | 53,856 | #2561629 | | Chicago | |
| ✓ Opponent | 115° | 65%+ | 480 | 179 | 2,508 | 22,520 | #900685 | | Radius | |
| ✓ oatz_mgoatz | 43° | | 519 | 331 | 2,486 | 291 | #3811127 | | New York | |
| ✓ OJdude | 105° | | 144 | 55 | 2,444 | 7,484 | #1653243 | | Radius | |
| ✓ OG_Diddles | 126° | 65%+ | 316 | 137 | 2,302 | 8,304 | #2197478 | | Atlanta | |
| ✓ oreganoo | 166° | 65%+ | 549 | 505 | 2,267 | 640 | #2635117 | | New York | |
| ✓ OopsYouDied | 59° | 65%+ | 832 | 361 | 2,231 | 14,660 | #2224378 | | New York | |
| ✓ Onra | 120° | 65%+ | 529 | 335 | 2,092 | 35,450 | #2958379 | | Dallas | |