# 2010 Pan Pacific Swimming Championships – Men's 100 metre butterfly

The men's 100 metre butterfly competition at the 2010 Pan Pacific Swimming Championships took place on August 20 at the William Woollett Jr. Aquatics Center. The last champion was Ian Crocker 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 Phelps (USA) | 49.82 | Rome, Italy | August 1, 2009 |
| Pan Pacific Championships record | Ian Crocker (USA) | 51.47 | Victoria, Canada | August 19, 2006 |

## 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 20, at 11:01.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 6 | 4 | Michael Phelps | United States | 51.48 | QA |
| 2 | 6 | 6 | Tyler McGill | United States | 51.69 | QA |
| 3 | 6 | 5 | Takuro Fujii | Japan | 52.20 | QA |
| 4 | 4 | 3 | Geoff Huegill | Australia | 52.21 | QA |
| 5 | 4 | 6 | Timothy Phillips | United States | 52.25 | QA |
| 6 | 6 | 3 | Masayuki Kishida | Japan | 52.32 | QA |
| 7 | 5 | 2 | Chris Wright | Australia | 52.51 | QA |
| 8 | 5 | 4 | Andrew Lauterstein | Australia | 52.55 | QA |
| 9 | 4 | 5 | Mitchell Patterson | Australia | 52.56 | QB |
| 10 | 4 | 7 | Nick D'Arcy | Australia | 52.77 | QB |
| 10 | 5 | 7 | Ryan Pini | Papua New Guinea | 52.77 | QB |
| 12 | 2 | 4 | Wu Peng | China | 52.80 | QB |
| 13 | 4 | 4 | Gabriel Mangabeira | Brazil | 52.83 | QB |
| 14 | 5 | 5 | Kaio Almeida | Brazil | 53.03 | QB |
| 15 | 5 | 8 | Joe Bartoch | Canada | 53.06 | QB |
| 16 | 3 | 3 | Ricky Berens | United States | 53.09 | QB |
| 17 | 5 | 6 | Thiago Pereira | Brazil | 53.28 | |
| 18 | 4 | 2 | Jeong Doo-Hee | South Korea | 53.36 | |
| 19 | 4 | 8 | Moss Burmester | New Zealand | 53.49 | |
| 20 | 6 | 8 | Ryo Takayasu | Japan | 53.63 | |
| 20 | 5 | 1 | Mark Dylla | United States | 53.63 | |
| 22 | 6 | 1 | Jayden Hadler | Australia | 53.67 | |
| 23 | 3 | 4 | Shunsuke Kuzuhara | Japan | 53.74 | |
| 24 | 3 | 4 | Shaune Fraser | Cayman Islands | 53.75 | |
| 25 | 4 | 1 | Yuki Kobori | Japan | 53.76 | |
| 26 | 3 | 5 | Kazuya Kaneda | Japan | 53.78 | |
| 27 | 6 | 7 | Gláuber Silva | Brazil | 54.09 | |
| 28 | 3 | 6 | Lucas Salatta | Brazil | 54.17 | |
| 29 | 3 | 1 | Leith Brodie | Australia | 54.23 | |
| 30 | 5 | 3 | Fernando Silva | Brazil | 54.41 | |
| 31 | 2 | 2 | Brett Fraser | Cayman Islands | 54.43 | |
| 32 | 1 | 4 | Park Minkyu | South Korea | 54.67 | |
| 33 | 3 | 7 | Stefan Hirniak | Canada | 54.70 | |
| 34 | 2 | 3 | Karl Wolk | Canada | 54.71 | |
| 35 | 3 | 8 | Sebastian Rousseau | South Africa | 54.88 | |
| 36 | 2 | 6 | Ryusuke Sakata | Japan | 55.14 | |
| 37 | 1 | 5 | Zack Chetrat | Canada | 55.42 | |
| 38 | 2 | 7 | Taki Mrabet | Tunisia | 55:73 | |
| 39 | 2 | 5 | Nicholas Tan | Singapore | 56:26 | |
| 40 | 1 | 3 | Yan Ho-Chun | Hong Kong | 58:49 | |
| - | 3 | 2 | Hsu Chi-Chieh | Chinese Taipei | DNS | |

### B Final

The B final was held on August 20, at 18:55.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Timothy Phillips | United States | 52.21 |
| 10 | 2 | Joe Bartoch | Canada | 53.20 |
| 11 | 6 | Kaio Almeida | Brazil | 53.22 |
| 12 | 5 | Andrew Lauterstein | Australia | 53.28 |
| 13 | 7 | Jeong Doo-Hee | South Korea | 53.45 |
| 14 | 1 | Moss Burmester | New Zealand | 53.98 |
| 15 | 3 | Gabriel Mangabeira | Brazil | 54.07 |
| 16 | 8 | Ryo Takayasu | Japan | 54.35 |

### A Final

The A final was held on August 20, at 18:55.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Michael Phelps | United States | 50.86 | CR |
| | 5 | Tyler McGill | United States | 51.85 | |
| | 3 | Takuro Fujii | Japan | 52.12 | |
| 4 | 2 | Masayuki Kishida | Japan | 52.16 | |
| 5 | 6 | Geoff Huegill | Australia | 52.32 | |
| 6 | 7 | Chris Wright | Australia | 52.40 | |
| 7 | 1 | Wu Peng | China | 52.61 | |
| 8 | 8 | Ryan Pini | Papua New Guinea | 52.94 | |