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

The men's 100 metre freestyle competition at the 2010 Pan Pacific Swimming Championships took place on August 19 at the William Woollett Jr. Aquatics Center. The last champion was Brent Hayden of Canada.
This race consisted of two lengths of the pool, both lengths being in freestyle.

## Records

Prior to this competition, the existing world and Pan Pacific records were as follows:
| World record | César Cielo Filho (BRA) | 46.91 | Rome, Italy | July 30, 2009 |
| Pan Pacific Championships record | Brent Hayden (CAN) | 48.59 | Victoria, Canada | August 18, 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 19, at 10:16.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 7 | 5 | Nathan Adrian | United States | 48.41 | QA, CR |
| 2 | 8 | 7 | Jason Lezak | United States | 48.47 | QA |
| 3 | 6 | 6 | Brent Hayden | Canada | 48.50 | QA |
| 4 | 7 | 8 | Kyle Richardson | Australia | 48.69 | QA |
| 5 | 8 | 6 | Eamon Sullivan | Australia | 48.92 | QA |
| 6 | 6 | 1 | James Magnussen | Australia | 48.95 | QB |
| 7 | 6 | 4 | Garrett Weber-Gale | United States | 48.98 | QB |
| 8 | 5 | 5 | Graeme Moore | South Africa | 48.99 | QA |
| 9 | 8 | 2 | Cameron Prosser | Australia | 49.02 | |
| 10 | 7 | 4 | Lyndon Ferns | South Africa | 49.09 | QA |
| 11 | 8 | 4 | César Cielo | Brazil | 49.13 | QA |
| 12 | 8 | 5 | Nicolas Oliveira | Brazil | 49.20 | QB |
| 13 | 6 | 5 | Gideon Louw | South Africa | 49.26 | QB |
| 14 | 8 | 3 | Tommaso D'Orsogna | Australia | 49.36 | |
| 15 | 4 | 3 | Nicholas Ffrost | Australia | 49.42 | |
| 16 | 4 | 6 | Kenrick Monk | Australia | 49.53 | |
| 17 | 6 | 3 | Takuro Fujii | Japan | 49.63 | QB |
| 18 | 4 | 5 | Ricky Berens | United States | 49.64 | |
| 19 | 6 | 7 | Henrique Rodrigues | Brazil | 49.70 | QB |
| 20 | 3 | 1 | Mitchell Patterson | Australia | 49.95 | |
| 21 | 4 | 2 | Sho Uchida | Japan | 50.00 | QB |
| 22 | 7 | 6 | Brett Fraser | Cayman Islands | 50.02 | QB |
| 23 | 5 | 1 | Rammaru Harada | Japan | 50.06 | |
| 24 | 6 | 8 | Cullen Jones | United States | 50.14 | |
| 25 | 7 | 7 | Bruno Fratus | Brazil | 50.16 | |
| 26 | 5 | 3 | Andrew Lauterstein | Australia | 50.18 | |
| 27 | 3 | 4 | George Bovell | Trinidad and Tobago | 50.20 | |
| 28 | 4 | 8 | Peter Vanderkaay | United States | 50.22 | |
| 29 | 4 | 4 | Shunsuke Kuzuhara | Japan | 50.23 | |
| 30 | 3 | 8 | Richard Hortness | Canada | 50.25 | |
| 31 | 3 | 2 | Carl O'Donnell | New Zealand | 50.28 | |
| 32 | 3 | 6 | Ryan Pini | Papua New Guinea | 50.29 | |
| 33 | 7 | 3 | Shaune Fraser | Cayman Islands | 50.43 | |
| 34 | 2 | 3 | Timothy Phillips | United States | 50.45 | |
| 35 | 6 | 2 | Nicholas Santos | Brazil | 50.46 | |
| 36 | 5 | 4 | Yuki Kobori | Japan | 50.49 | |
| 37 | 5 | 7 | Makoto Ito | Japan | 50.50 | |
| 38 | 5 | 6 | Yoshihiro Okumura | Japan | 50.52 | |
| 39 | 3 | 5 | Leith Brodie | Australia | 50.53 | |
| 40 | 2 | 6 | Luke Peddie | Canada | 50.61 | |
| 41 | 8 | 1 | Rodrigo Castro | Brazil | 50.68 | |
| 42 | 3 | 7 | Gláuber Silva | Brazil | 50.77 | |
| 42 | 4 | 1 | Hassaan Khalik | Canada | 50.77 | |
| 44 | 5 | 2 | Federico Grabich | Argentina | 50.79 | |
| 45 | 3 | 3 | Joaquin Belza | Argentina | 50.86 | |
| 46 | 1 | 3 | Park Seon-Kwan | South Korea | 50.90 | |
| 47 | 2 | 2 | Chris Wright | Australia | 50.92 | |
| 48 | 1 | 4 | Joonmo Bae | South Korea | 50.97 | |
| 49 | 7 | 1 | Fernando Silva | Brazil | 51.00 | |
| 50 | 2 | 5 | Blake Worsley | Canada | 51.07 | |
| 50 | 7 | 2 | Roland Schoeman | South Africa | 51.07 | |
| 52 | 4 | 7 | Minkyu Park | South Korea | 51.24 | |
| 53 | 2 | 4 | Sebastian Jahnsen | Peru | 52.10 | |
| 54 | 2 | 7 | Nicholas Tan | Singapore | 52.12 | |
| 55 | 2 | 1 | Chun Yin Kong | Hong Kong | 52.89 | |
| 56 | 1 | 5 | Ho Chun Yan | Hong Kong | 52.89 | |
| - | 5 | 8 | Masayuki Kishida | Japan | DNS | |
| - | 8 | 8 | Colin Russell | Canada | DNS | |

### B Final

The B final was held on August 19, at 18:16.
| Rank | Lane | Name | Nationality | Time |
| 9 | 5 | Garrett Weber-Gale | United States | 48.73 |
| 10 | 4 | James Magnussen | Australia | 48.94 |
| 11 | 6 | Gideon Louw | South Africa | 49.13 |
| 12 | 3 | Nicolas Oliveira | Brazil | 49.36 |
| 13 | 2 | Takuro Fujii | Japan | 49.90 |
| 14 | 7 | Henrique Rodrigues | Brazil | 49.91 |
| 15 | 1 | Sho Uchida | Japan | 49.98 |
| 16 | 8 | Brett Fraser | Cayman Islands | 50.29 |

### A Final

The A final was held on August 19, at 18:16.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | Nathan Adrian | United States | 48.15 | CR |
| | 3 | Brent Hayden | Canada | 48.19 | |
| | 8 | César Cielo | Brazil | 48.48 | |
| 4 | 5 | Jason Lezak | United States | 48.57 | |
| 5 | 7 | Graeme Moore | South Africa | 48.76 | |
| 6 | 6 | Kyle Richardson | Australia | 48.81 | |
| 7 | 2 | Eamon Sullivan | Australia | 48.84 | |
| 8 | 1 | Lyndon Ferns | South Africa | 49.46 | |