She earned 3 individual NCAA titles and 3 individual SEC titles in the 1650 freestyle as well as 3 NCAA and 4 SEC team titles. In 2006 and 2007, Peirsol also trained with Club Wolverine at the University of Michigan along with teammates Erik Vendt, Michael Phelps, Klete and Kalyn Keller, and Kaitlin Sandeno under Bob Bowman and distance expert Jon Urbanchek. In 2006, Hayley became the third woman in history to ever break 16 minutes in the 1500 meter freestyle, the other two women being Janet Evans and Kate Ziegler.
She won 3 NCAA titles and 3 SEC titles in the 1650 freestyle, as well as 3 NCAA and 4 SEC team titles. In 2006 and 2007, Peirsol trained with Club Wolverine at the University of Michigan alongside teammates Erik Vendt, Michael Phelps, Klete and Kalyn Keller, and Kaitlin Sandeno under Bob Bowman and distance expert Jon Urbanchek. In 2006, Hayley became the third woman in history to ever break 16 minutes in the 1500 meter freestyle, joining Janet Evans and Kate Ziegler.