| Competition | 1999 Pan Pacific Swimming Championships | 
|---|---|
| Venue | Sydney | 
| Held | 23 – 24 August 1999 | 
| Status | Medal | 
| Competitors | 23 | 
| Countries | 7 | 
| Pos | Athlete(s) | Country | Preliminary Round | Semi-Finals | Final | ||
|---|---|---|---|---|---|---|---|
| 🥇 | Lenny Krayzelburg | 54.80 (1 h1) | 54.07 (1 h1) | 53.60 (1 F) | * | ||
| 🥈 | Matt Welsh | 56.17 (6 h1) | 55.42 (2 h1) | 55.13 (2 F) | |||
| 🥉 | Josh Watson | 56.07 (=3 h1) | 55.84 (7 h1) | 55.18 (3 F) | |||
| 4 | Bobby Brewer | 56.09 (5 h1) | 55.56 (3 h1) | 55.39 (4 F) | |||
| 5 | Atsushi Nishikori | 55.92 (2 h1) | 55.58 (4 h1) | 55.61 (5 F) | |||
| 6 | Keitaro Konnai | 56.07 (=3 h1) | 55.70 (5 h1) | 55.62 (6 F) | |||
| 7 | Mark Versfeld | 56.25 (7 h1) | 55.83 (6 h1) | 55.82 (7 F) | |||
| 8 | Chris Renaud | 56.82 (12 h1) | 56.40 (11 h1) | 55.87 (8 F) | |||
| 9 | Brad Bridgewater | 56.40 (8 h1) | 56.07 (8 h1) | — | |||
| 10 | Raymond Hass | 56.42 (9 h1) | 56.15 (9 h1) | — | |||
| 11 | Neil Walker | 56.51 (11 h1) | 56.16 (10 h1) | — | |||
| 12 | Cameron Delaney | 57.31 (15 h1) | 56.48 (12 h1) | — | |||
| 13 | Dustin Hersee | 56.50 (10 h1) | 56.52 (13 h1) | — | |||
| 14 | Simon Thirsk | 56.96 (13 h1) | 56.64 (14 h1) | — | |||
| 15 | Alex Lim | 57.02 (14 h1) | 57.17 (15 h1) | — | |||
| 16 | Greg Hamm | 57.43 (16 h1) | 57.57 (16 h1) | — | |||
| 17 | Naoya Sonoda | 57.69 (17 h1) | — | — | |||
| 18 | Rob Van der Zant | 57.90 (18 h1) | — | — | |||
| 19 | Scott Miller | 58.02 (19 h1) | — | — | |||
| 20 | Geoff Huegill | 58.22 (20 h1) | — | — | |||
| 21 | Greg Main-Baillie | 58.48 (21 h1) | — | — | |||
| 22 | Scott Talbot | 58.79 (22 h1) | — | — | |||
| 23 | Torin Hay | 58.82 (23 h1) | — | — | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Lenny Krayzelburg | 54.80 | ||
| 2 | Atsushi Nishikori | 55.92 | ||
| =3 | Josh Watson | 56.07 | ||
| =3 | Keitaro Konnai | 56.07 | ||
| 5 | Bobby Brewer | 56.09 | ||
| 6 | Matt Welsh | 56.17 | ||
| 7 | Mark Versfeld | 56.25 | ||
| 8 | Brad Bridgewater | 56.40 | ||
| 9 | Raymond Hass | 56.42 | ||
| 10 | Dustin Hersee | 56.50 | ||
| 11 | Neil Walker | 56.51 | ||
| 12 | Chris Renaud | 56.82 | ||
| 13 | Simon Thirsk | 56.96 | ||
| 14 | Alex Lim | 57.02 | ||
| 15 | Cameron Delaney | 57.31 | ||
| 16 | Greg Hamm | 57.43 | ||
| 17 | Naoya Sonoda | 57.69 | ||
| 18 | Rob Van der Zant | 57.90 | ||
| 19 | Scott Miller | 58.02 | ||
| 20 | Geoff Huegill | 58.22 | ||
| 21 | Greg Main-Baillie | 58.48 | ||
| 22 | Scott Talbot | 58.79 | ||
| 23 | Torin Hay | 58.82 | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Lenny Krayzelburg | 54.07 | ||
| 2 | Matt Welsh | 55.42 | ||
| 3 | Bobby Brewer | 55.56 | ||
| 4 | Atsushi Nishikori | 55.58 | ||
| 5 | Keitaro Konnai | 55.70 | ||
| 6 | Mark Versfeld | 55.83 | ||
| 7 | Josh Watson | 55.84 | ||
| 8 | Brad Bridgewater | 56.07 | ||
| 9 | Raymond Hass | 56.15 | ||
| 10 | Neil Walker | 56.16 | ||
| 11 | Chris Renaud | 56.40 | ||
| 12 | Cameron Delaney | 56.48 | ||
| 13 | Dustin Hersee | 56.52 | ||
| 14 | Simon Thirsk | 56.64 | ||
| 15 | Alex Lim | 57.17 | ||
| 16 | Greg Hamm | 57.57 | 
| Pos | Athlete(s) | Country | Mark | |
|---|---|---|---|---|
| 1 | Lenny Krayzelburg | 53.60 | ||
| 2 | Matt Welsh | 55.13 | ||
| 3 | Josh Watson | 55.18 | ||
| 4 | Bobby Brewer | 55.39 | ||
| 5 | Atsushi Nishikori | 55.61 | ||
| 6 | Keitaro Konnai | 55.62 | ||
| 7 | Mark Versfeld | 55.82 | ||
| 8 | Chris Renaud | 55.87 |