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

The men's 100 metre freestyle competition of the swimming events at the 2011 Pan American Games took place on October 16 at the Scotiabank Aquatics Center in the municipality of Zapopan, near Guadalajara, Mexico. The defending Pan American Games champion was César Cielo Filho of the Brazil.
This race consisted of two lengths of the pool, both lengths in freestyle.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | César Cielo Filho (BRA) | 46.91 | Rome, Italy | July 30, 2009 |
| Pan American Games record | César Cielo Filho (BRA) | 48.79 | Rio de Janeiro, Brazil | July 18, 2007 |

## Qualification

Each National Olympic Committee (NOC) was able to enter up to two entrants providing they had met the A standard (50.4) 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 (51.9) in the same qualifying period.

## Results

All times are in minutes and seconds.
| KEY: | q | Fastest non-qualifiers | Q | Qualified | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The first round was held on October 16.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 4 | César Cielo | Brazil | 48.89 | QA |
| 2 | 3 | 3 | Shaune Fraser | Cayman Islands | 49.00 | QA |
| 3 | 3 | 5 | Hanser García | Cuba | 49.08 | QA |
| 4 | 2 | 5 | Douglas Robison | United States | 49.09 | QA |
| 5 | 1 | 4 | Brett Fraser | Cayman Islands | 49.16 | QA |
| 6 | 1 | 5 | Robert Savulich | United States | 49.58 | QA |
| 7 | 1 | 6 | Cristian Quintero | Venezuela | 49.87 | QA |
| 8 | 2 | 3 | Benjamin Hockin | Paraguay | 49.91 | QA |
| 9 | 1 | 3 | Federico Grabich | Argentina | 50.20 | QB |
| 10 | 3 | 6 | Crox Acuña | Venezuela | 50.35 | QB |
| 11 | 2 | 4 | Bruno Fratus | Brazil | 50.51 | QB |
| 12 | 2 | 6 | Gabriel Melconian | Uruguay | 51.02 | QB |
| 13 | 3 | 2 | Rory Biskupski | Canada | 51.12 | QB |
| 14 | 3 | 7 | Shawn Clarke | Barbados | 51.18 | QB |
| 15 | 2 | 1 | Alejandro Escudero | Mexico | 51.38 | QB |
| 16 | 1 | 7 | Mario Montoya | Costa Rica | 51.86 | QB |
| 17 | 2 | 7 | Raúl Martínez | Puerto Rico | 52.06 | |
| 18 | 3 | 1 | Antonio Cisneros | Mexico | 52.42 | |
| 19 | 2 | 2 | Branden Whitehurst | U.S. Virgin Islands | 52.45 | |
| 20 | 1 | 2 | Roy-Allan Burch | Bermuda | 52.87 | |
| 21 | 3 | 8 | Perry Lindo | Netherlands Antilles | 53.32 | |
| 22 | 1 | 1 | Esau Simpson | Grenada | 54.73 | |
| 23 | 1 | 8 | Niall Roberts | Guyana | 55.45 | |
| 24 | 2 | 8 | Orel Jeffrey | Antigua and Barbuda | 1:03.84 | |

### B Final

The B final was also held on October 16.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Federico Grabich | Argentina | 49.95 |
| 10 | 5 | Gabriel Melconian | Uruguay | 50.30 |
| 11 | 6 | Shawn Clarke | Barbados | 51.00 |
| 12 | 3 | Rory Biskupski | Canada | 51.15 |
| 13 | 2 | Alejandro Escudero | Mexico | 51.66 |
| 14 | 7 | Mario Montoya | Costa Rica | 51.83 |
| 15 | 1 | Raúl Martínez | Puerto Rico | 51.94 |
| 16 | 8 | Antonio Cisneros | Mexico | 52.55 |

### A Final

The A final was also held on October 16.
| Rank | Lane | Name | Nationality | Time | Notes |
| | 4 | César Cielo | Brazil | 47.84 | GR |
| | 3 | Hanser García | Cuba | 48.34 | |
| | 5 | Shaune Fraser | Cayman Islands | 48.63 | |
| 4 | 6 | Douglas Robison | United States | 48.98 | |
| 5 | 2 | Brett Fraser | Cayman Islands | 49.07 | |
| 6 | 7 | Robert Savulich | United States | 49.62 | |
| 7 | 1 | Cristian Quintero | Venezuela | 49.75 | |
| 8 | 8 | Benjamin Hockin | Paraguay | 50.03 | |