2010 Pan Pacific Swimming Championships – Men's 4 × 100 metre medley relay
The men's 4 × 100 metre medley relay competition at the 2010 Pan Pacific Swimming Championships took place on August 21 at the William Woollett Jr. Aquatics Center. The last champion was the United States.
Records
Prior to this competition, the existing world and Pan Pacific records were as follows:| World record | Aaron Peirsol Eric Shanteau Michael Phelps David Walters | 3:27.28 | Rome, Italy | August 2, 2009 |
| Pan Pacific Championships record | Aaron Peirsol Brendan Hansen Ian Crocker Jason Lezak | 3:31.79 | Victoria, Canada | August 20, 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
Heats weren't performed, as only seven teams had entered.Final
The final was held on August 21, at 20:27.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Aaron Peirsol Mark Gangloff Michael Phelps Nathan Adrian | 3:32.48 | |||
| 6 | Junya Koga Kosuke Kitajima Masayuki Kishida Takuro Fujii | 3:33.90 | |||
| 5 | Ashley Delaney Christian Sprenger Geoff Huegill Kyle Richardson | 3:35.55 | |||
| 4 | 3 | Guilherme Guido Tales Cerdeira Gabriel Mangabeira César Cielo | 3:36.86 | ||
| 5 | 2 | Jake Tapp Scott Dickens Joe Bartoch Brent Hayden | 3:37.01 | ||
| 6 | 1 | Gareth Kean Glenn Snyders Moss Burmester Carl O'Donnell | 3:38.69 | ||
| 7 | 7 | Park Seon-Kwan Choi Kyu-Woong Jeong Doo-Hee Park Minkyu | 3:43.00 |