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Athletics at the 1955 Pan American Games
Track events
60 m		women
100 m	men	women
200 m	men
400 m	men
800 m	men
1500 m	men
5000 m	men
10,000 m	men
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400 m hurdles	men
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4×400 m relay	men
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v t e

The men's 400 metres event at the 1955 Pan American Games was held at the Estadio Universitario in Mexico City on 17 and 18 March.

Medalists

Gold	Silver	Bronze
Lou Jones  United States	Jim Lea  United States	Jesse Mashburn  United States

Results

Heats

Held on 17 March

Rank	Heat	Name	Nationality	Time	Notes
1	1	Lou Jones	United States	47.66	Q, GR
2	1	Mel Spence	Jamaica	47.86	Q
3	1	Evaristo Eddie	Venezuela	47.94	Q
4	1	Jorge Terán	Mexico	48.78
5	1	Ovidio de Jesús	Puerto Rico	49.97
1	2	Guillermo Gutiérrez	Venezuela	48.31	Q
2	2	Argemiro Roque	Brazil	48.62	Q
3	2	Allan Moore	Jamaica	48.83	Q
4	2	Pablo Salinas	Mexico	49.57
5	2	Cyril Johnson	Bahamas	51.62
	2	Angel García	Cuba	DNF
1	3	Jim Lea	United States	48.93	Q
2	3	Frank Rivera	Puerto Rico	48.94	Q
3	3	Dick Harding	Canada	49.27	Q
4	3	Evelio Planas	Cuba	49.47
1	4	Jesse Mashburn	United States	50.59	Q
2	4	Waldemiro Monteiro	Brazil	53.90	Q

Semifinals

Held on 17 March

Rank	Heat	Name	Nationality	Time	Notes
1	1	Lou Jones	United States	47.10	Q, GR
2	1	Jim Lea	United States	47.69	Q
3	1	Evaristo Eddie	Venezuela	47.91	Q
4	1	Allan Moore	Jamaica	48.34
5	1	Argemiro Roque	Brazil	48.55
1	2	Jesse Mashburn	United States	47.51	Q
2	2	Frank Rivera	Puerto Rico	48.01	Q
3	2	Mel Spence	Jamaica	48.09	Q
4	2	Dick Harding	Canada	48.28
5	2	Guillermo Gutiérrez	Venezuela	48.61
6	2	Waldemiro Monteiro	Brazil	49.66

Final

Held on 18 March

Rank	Name	Nationality	Time	Notes
	Lou Jones	United States	45.68	WR
	Jim Lea	United States	45.78
	Jesse Mashburn	United States	46.44
4	Frank Rivera	Puerto Rico	48.37
5	Mel Spence	Jamaica	48.84
	Evaristo Eddie	Venezuela	DNF

References

1. Full results
2. "Track and Field Statistics". trackfield.brinkster.net. Retrieved 16 October 2020.

• Athletics at the 1955 Pan American Games
• 400 metres at the Pan American Games