Srebro je pripalo njegovu sunarodnjaku Ryanu Lochteu, a bronce se dokopao Britanac Liam Tancock.
100m leđno, muškarci:
1. Aaron Peirsol (SAD) 52.98 - svjetski rekord
2. Ryan Lochte (SAD) 53.50
3. Liam Tancock (VB) 53.61
4. Arkady Vyatchanin (Rus) 53.69
5. Markus Rogan (Aut) 53.78
6. Gerhard Zandberg (JAR) 54.59
7. Matt Welsh (Aus) 54.65
8. Tomomi Morita (Jap) 55.04
Razvoj svjetskog rekorda na 100m leđno za plivače:
55.00: Igor Polianski (SSSR), 16/07/88, Moskva
54.95: David Berkoff (SAD), 12/08/88, Austin (SAD)
54.91: David Berkoff (SAD), 12/08/88, Austin
54.51: David Berkoff (SAD), 24/09/88, Seul
53.93: Jeff Rouse (SAD), 25/08/91, Edmonton
53.86: Jeff Rouse (SAD), 31/07/92, Barcelona
53.60: Lenny Krayzelburg (SAD), 24/08/99, Sydney
53.45: Aaron Peirsol (SAD), 21/08/04, Atena
53.17: Aaron Peirsol (SAD), 02/04/05, Indianapolis
52.98: Aaron Peirsol (SAD), 27/03/07, Melbourne