# Swimming at the 2023 Pan American Games – Men's 100 metre butterfly

The men's 100 metre butterfly competition of the swimming events at the 2023 Pan American Games were held on October 22, 2023, at the Aquatic Center in Santiago, Chile.

## Records

Prior to this competition, the existing world and Pan American Games records were as follows:
| World record | Caeleb Dressel (USA) | 49.45 | Tokyo, Japan | July 31, 2021 |
| Pan American Games record | Will Lincon (USA) | 51.44 | Lima, Peru | August 7, 2019 |

## Results

| KEY: | QA | Qualified for A final | QB | Qualified for B final | GR | Games record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

The highest eight scores advance to the final.
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 4 | 4 | Lukas Miller | United States | 51.99 | QA |
| 2 | 4 | 3 | Vinicius Lanza | Brazil | 52.78 | QA |
| 3 | 3 | 5 | Jorge Otaiza | Venezuela | 53.08 | QA |
| 4 | 4 | 5 | Victor Baganha | Brazil | 53.11 | QA |
| 5 | 3 | 4 | Arsenio Bustos | United States | 53.21 | QA |
| 6 | 2 | 4 | Finlay Knox | Canada | 53.33 | QA |
| 7 | 3 | 3 | Ángel Martínez | Mexico | 53.95 | QA |
| 8 | 4 | 6 | David Arias | Colombia | 53.97 | QA |
| 9 | 4 | 2 | Esnaider Reales | Colombia | 53.99 | QB |
| 10 | 3 | 6 | Keir Ogilvie | Canada | 54.22 | QB |
| 11 | 2 | 5 | Jorge Iga | Mexico | 54.30 | QB |
| 12 | 3 | 2 | Benjamín Schnapp | Chile | 54.56 | QB |
| 13 | 2 | 3 | Emil Pérez | Venezuela | 54.63 | QB |
| 14 | 2 | 2 | Zarek Wilson | Trinidad and Tobago | 54.74 | QB |
| 15 | 2 | 6 | Benjamín Hockin | Paraguay | 54.76 | QB |
| 16 | 4 | 7 | Elías Ardiles | Chile | 55.04 | QB |
| 17 | 4 | 1 | Esteban Nuñez del Prado | Bolivia | 55.10 | |
| 18 | 2 | 7 | Carlos Vasquez | Honduras | 55.14 | |
| 19 | 1 | 6 | Mikel Schreuders | Aruba | 55.92 | |
| 20 | 3 | 8 | Emmanuel Gadson | Bahamas | 56.32 | |
| 21 | 3 | 1 | Jeancarlo Calderón | Panama | 56.50 | |
| 22 | 3 | 7 | Jayhan Odlum-Smith | Saint Lucia | 56.56 | |
| 23 | 2 | 8 | Sidrell Williams | Jamaica | 56.79 | |
| 24 | 4 | 8 | Zackary Gresham | Grenada | 56.91 | |
| 25 | 1 | 4 | Christopher Gossmann | Independent Athletes Team | 57.02 | |
| 26 | 1 | 5 | Gerald Hernández | Nicaragua | 57.90 | |
| 27 | 1 | 2 | Xavier Ventura | El Salvador | 58.61 | |
| 28 | 1 | 3 | Irvin Hoost | Suriname | 58.76 | |
| 29 | 1 | 7 | Adriel Sanes | Virgin Islands | 58.86 |
| | 2 | 1 | Noah Mascoll-Gomes | Antigua and Barbuda | DNS | |

### Final B

The B final was held on October 21.
| Rank | Lane | Name | Nationality | Time |
| 9 | 4 | Esnaider Reales | Colombia | 53.87 |
| 10 | 5 | Keir Ogilvie | Canada | 54.15 |
| 11 | 3 | Benjamín Schnapp | Chile | 54.35 |
| 12 | 7 | Benjamín Hockin | Paraguay | 54.57 |
| 13 | 1 | Elías Ardiles | Chile | 54.60 |
| 14 | 2 | Zarek Wilson | Trinidad and Tobago | 54.61 |
| 15 | 8 | Esteban Nuñez del Prado | Bolivia | 54.71 |
| 16 | 6 | Emil Pérez | Venezuela | 55.08 |

### Final A

The A final was held on October 21.
| Rank | Lane | Name | Nationality | Time |
| | 4 | Lukas Miller | United States | 51.98 |
| | 5 | Vinicius Lanza | Brazil | 52.52 |
| | 2 | Arsenio Bustos | United States | 52.60 |
| 4 | 7 | Finlay Knox | Canada | 52.89 |
| 5 | 3 | Jorge Otaiza | Venezuela | 52.95 |
| 6 | 6 | Victor Baganha | Brazil | 53.00 |
| 7 | 1 | Ángel Martínez | Mexico | 53.73 |
| 8 | 8 | David Arias | Colombia | 53.79 |