Swimming at the 2015 Pan American Games – Men's 100 metre butterfly
The men's 100 metre butterfly competition of the swimming events at the 2015 Pan American Games took place on July 16 at the CIBC Pan Am/Parapan Am Aquatics Centre and Field House in Toronto, Canada. The defending Pan American Games champion was Albert Subirats of Venezuela.
This race consisted of two lengths of the pool, all lengths in butterfly. The top eight swimmers from the heats would qualify for the A final, while the next best eight swimmers would qualify for the B final.
Records
Prior to this competition, the existing world and Pan American Games records were as follows:| World record | 49.82 | Rome, Italy | August 1, 2009 | |
| Pan American Games record | 52.05 | Rio de Janeiro, Brazil | July 18, 2007 |
The following new records were set during this competition.
| Date | Event | Name | Nationality | Time | Record |
| 16 July | A Final | Giles Smith | 52.04 | GR |
Qualification
Each National Olympic Committee was able to enter up to two entrants providing they had met the A standard in the qualifying period. NOCs were also permitted to enter one athlete providing they had met the B standard in the same qualifying period. All other competing athletes were entered as universality spots.Schedule
All times are Eastern Time Zone.| Date | Time | Round |
| July 16, 2015 | 10:56 | Heats |
| July 16, 2015 | 20:13 | Final B |
| July 16, 2015 | 20:18 | Final A |
Results
Heats
The first round was held on July 16.| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 3 | 4 | Giles Smith | 52.13 | QA | |
| 2 | 3 | 3 | Mauricio Fiol | 52.25 | QA | |
| 3 | 2 | 5 | Santiago Grassi | 52.34 | QA | |
| 4 | 2 | 2 | Long Yuan Gutierrez | 52.57 | QA | |
| 5 | 1 | 5 | Albert Subirats | 52.60 | QA | |
| 6 | 3 | 5 | Santo Condorelli | 52.67 | QA | |
| 7 | 1 | 4 | Arthur Mendes | 52.85 | QA | |
| 8 | 2 | 3 | Eugene Godsoe | 52.89 | QA | |
| 9 | 3 | 6 | Luiz Martínez | 52.90 | QB | |
| 10 | 1 | 3 | Coleman Allen | 53.23 | QB | |
| 11 | 1 | 6 | Ben Hockin | 53.63 | QB | |
| 12 | 2 | 6 | Marcos Barale | 53.73 | QB | |
| 13 | 3 | 7 | Dylan Carter | 53.89 | QB | |
| 14 | 3 | 2 | Esnaider Reales | 54.42 | QB | |
| 15 | 1 | 2 | Andrew Torres | 54.69 | QB | |
| 16 | 2 | 7 | Allan Gutiérrez Castro | 55.52 | QB | |
| 17 | 1 | 7 | Aldo Castillo Sulca | 57.25 | ||
| 2 | 4 | Thiago Pereira | DNS |
B Final
The B final was also held on July 16.| Rank | Lane | Name | Nationality | Time | Notes |
| 9 | 5 | Ben Hockin | 53.45 | ||
| 10 | 4 | Coleman Allen | 53.46 | ||
| 11 | 3 | Marcos Barale | 53.47 | ||
| 12 | 6 | Esnaider Reales | 54.03 | ||
| 13 | 2 | Andrew Torres | 54.77 | ||
| 14 | 7 | Allan Gutiérrez Castro | 55.21 | ||
| 15 | 1 | Aldo Castillo Sulca | 56.97 |
A Final
The A final was also held on July 16.| Rank | Lane | Name | Nationality | Time | Notes |
| 4 | Giles Smith | 52.04 | GR | ||
| 5 | Santiago Grassi | 52.09 | NR | ||
| 2 | Santo Condorelli | 52.42 | |||
| 4 | 6 | Albert Subirats | 52.52 | ||
| 5 | 3 | Long Yuan Gutierrez | 52.58 | ||
| 6 | 1 | Eugene Godsoe | 52.66 | ||
| 7 | 7 | Arthur Mendes | 52.73 | ||
| 8 | 8 | Luiz Martínez | 52.75 |
- Peruvian swimmer Mauricio Fiol was suspended by his team and pulled from the final for testing positive for stanozolol.