2010 Pan Pacific Swimming Championships – Men's 4 × 100 metre medley relay

Men's 4 × 100 metre medley relay at the 2010 Pan Pacific Swimming Championships
Venue	William Woollett Jr. Aquatics Center
Dates	August 21, 2010 (heats & finals)
Winning time	3:32.48
Medalists
Aaron Peirsol, Mark Gangloff, Michael Phelps and Nathan Adrian    United States   Junya Koga, Kosuke Kitajima, Masayuki Kishida and Takuro Fujii    Japan   Ashley Delaney, Christian Sprenger, Geoff Huegill and Kyle Richardson    Australia
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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.

Prior to this competition, the existing world and Pan Pacific records were as follows:

All times are in minutes and seconds.

Heats weren't performed, as only seven teams had entered.

The final was held on August 21, at 20:27.

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