Swimming at the 2011 Pan American Games – Men's 100 metre backstroke

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

World record	Aaron Peirsol (USA)	51.94	Indianapolis, United States	July 8, 2009
Pan American Games record	Randall Bal (USA)	53.66	Rio de Janeiro, Brazil	July 22, 2007

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the A standard (56.7) in the qualifying period (January 1, 2010 to September 4, 2011). NOCs were also permitted to enter one athlete providing they had met the B standard (58.6) in the same qualifying period.[2]

All times are in minutes and seconds.

Heats

The first round was held on October 17.

Rank	Heat	Lane	Name	Nationality	Time[3]	Notes
1	2	4	Eugene Godsoe	United States	55.04	QA
2	2	5	Thiago Pereira	Brazil	55.50	QA
3	1	4	David Russell	United States	55.57	QA
4	1	5	Guilherme Guido	Brazil	55.71	QA
5	1	3	Federico Grabich	Argentina	56.00	QA
6	2	6	Pedro Medel	Cuba	56.71	QA
7	2	3	Omar Pinzon	Colombia	56.82	QA
8	1	6	Luis Rojas	Venezuela	57.61	QA
9	1	2	Charles Hockin	Paraguay	57.65	QB
10	2	7	Miguel Robles	Mexico	57.93	QB
11	2	2	Anival Rodriguez	Mexico	59.29	QB

B Final

The B final was also held on October 17.[4]

Rank	Lane	Name	Nationality	Time	Notes
9	4	Miguel Robles	Mexico	58.29
10	5	Anival Rodriguez	Mexico	59.11

A Final

The A final was also held on October 17.[4]

Rank	Lane	Name	Nationality	Time[5]	Notes
	5	Thiago Pereira	Brazil	54.56
	4	Eugene Godsoe	United States	54.61
	6	Guilherme Guido	Brazil	54.81
4	3	David Russell	United States	54.87
5	2	Federico Grabich	Argentina	55.22
6	7	Pedro Medel	Cuba	56.16
7	1	Luis Rojas	Venezuela	57.54
8	8	Charles Hockin	Paraguay	57.63