| Name | Country | Swim | Bike | Run | Finish | Div. Rank | Overall Rank |
|---|---|---|---|---|---|---|---|
| OLSCAMP, ADAM | USA | 00:00:00 | 00:00:00 | 00:00:00 | 00:00:00 | -- | -- |
| OLSON, EILEEN | USA | 00:50:31 | 05:45:11 | 00:00:00 | 00:00:00 | -- | -- |
| OLSON, ERIK | USA | 00:48:24 | 04:41:03 | 08:08:02 | 08:08:02 | 8 | 433 |
| ONEILL, JASON | USA | 00:00:00 | 00:00:00 | 00:00:00 | 00:00:00 | -- | -- |
| ORNELLAS, MARCUS | BRA | 00:24:59 | 02:49:22 | 04:10:00 | 04:10:00 | 4 | 4 |
| ORTIZ, LUIS | PRI | 00:45:19 | 04:32:52 | 06:52:11 | 06:52:11 | 25 | 338 |
| ORTIZ-HUMPHREYS, RAFAEL | PRI | 00:34:38 | 03:39:40 | 05:39:19 | 05:39:19 | 17 | 134 |