- Who
- Jordan Proffitt
- What
- 27.86 second(s)
- Where
- United States (Louisville,University of Louisville Ralph Wright Natatorium)
- When
The fastest time to swim 50 metres underwater in a 25 metre pool is 27.86 seconds and was achieved by Jordan Proffitt (USA), at the University of Louisville Ralph Wright Natatorium, in Louisville, Kentucky, USA, on 18 November 2012.