# 1999 Pan Pacific Swimming Championships – Men's 100 metre butterfly

The men's 100 metre butterfly competition at the 1999 Pan Pacific Swimming Championships took place on August 27–28 at the Sydney International Aquatic Centre. The last champion was Neil Walker of US.
This race consisted of two lengths of the pool, all in butterfly.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:
| World record | Michael Klim (AUS) | 52.15 | Brisbane, Australia | October 9, 1997 |
| Pan Pacific Championships record | Neil Walker (USA) | 52.76 | Fukuoka, Japan | August 12, 1997 |

## Results

All times are in minutes and seconds.
| KEY: | q | Fastest non-qualifiers | Q | Qualified | CR | Championships record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on August 27.
| Rank | Name | Nationality | Time | Notes |
| 1 | Geoff Huegill | Australia | 52.86 | Q |
| 2 | Scott Miller | Australia | 53.34 | Q |
| 3 | Takashi Yamamoto | Japan | 53.64 | Q |
| 4 | Michael Klim | Australia | 53.72 | Q |
| 5 | Theo Verster | South Africa | 53.86 | Q |
| 6 | Dod Wales | United States | 54.01 | Q |
| 7 | Bryan Jones | United States | 54.10 | Q |
| 8 | Brock Newman | United States | 54.37 | Q |
| 9 | Mike Mintenko | Canada | 54.41 | Q |
| 10 | Shamek Pietucha | Canada | 54.56 | Q |
| 11 | Bill Kirby | Australia | 54.62 | Q |
| 12 | Ryan Kelly | South Africa | 54.89 | Q |
| 13 | Justin Norris | Australia | 54.93 | Q |
| 14 | Adam Sioui | Canada | 55.08 | Q |
| 15 | Douglas Browne | Canada | 55.58 | Q |
| 16 | Colin Sood | Canada | 55.59 | Q |
| 17 | Uğur Taner | United States | 55.81 | |
| 18 | Ian Crocker | United States | 55.83 | |
| 19 | Ryo Takayasu | Japan | 55.91 | |
| 20 | Joseph Marus | United States | 56.18 | |
| 21 | Han Kyu-Chul | South Korea | 56.21 | |
| 22 | Hisayoshi Tanaka | Japan | 56.24 | |
| 23 | Nicholas Sheeran | New Zealand | 56.28 | |
| 23 | Greg Shaw | Australia | 56.28 | |
| 25 | Philip Weiss | Canada | 56.75 | |
| 26 | Dean Kent | New Zealand | 57.80 | |
| 27 | Tseng Cheng-hua | Chinese Taipei | 58.16 | |
| 28 | Merlin Fredericks | South Africa | 1:02.00 | |

### Semifinals

The semifinals were held on August 27.
| Rank | Name | Nationality | Time | Notes |
| 1 | Geoff Huegill | Australia | 52.45 | Q, CR |
| 2 | Michael Klim | Australia | 52.76 | Q |
| 3 | Scott Miller | Australia | 53.01 | Q |
| 4 | Takashi Yamamoto | Japan | 53.14 | Q |
| 5 | Dod Wales | United States | 53.73 | Q |
| 6 | Brock Newman | United States | 53.94 | Q |
| 7 | Mike Mintenko | Canada | 53.97 | Q |
| 8 | Bryan Jones | United States | 54.18 | Q |
| 9 | Ian Crocker | United States | 54.31 | |
| 10 | Theo Verster | South Africa | 54.34 | |
| 11 | Bill Kirby | Australia | 54.52 | |
| 12 | Ryan Kelly | South Africa | 55.03 | |
| 13 | Ryo Takayasu | Japan | 55.08 | |
| 14 | Adam Sioui | Canada | 55.15 | |
| 15 | Shamek Pietucha | Canada | 55.40 | |
| 16 | Douglas Browne | Canada | 55.88 | |

### Final

The final was held on August 28.
| Rank | Lane | Nationality | Time |
| | Michael Klim | Australia | 52.49 |
| | Geoff Huegill | Australia | 52.51 |
| | Takashi Yamamoto | Japan | 52.93 |
| 4 | Dod Wales | United States | 53.38 |
| 5 | Brock Newman | United States | 53.86 |
| 6 | Mike Mintenko | Canada | 54.01 |
| 7 | Theo Verster | South Africa | 54.28 |
| 8 | Ryan Kelly | South Africa | 54.34 |