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Athletics at the 1963 Pan American Games
Track events
100 m	men	women
200 m	men	women
400 m	men
800 m	men	women
1500 m	men
5000 m	men
10,000 m	men
80 m hurdles		women
110 m hurdles	men
400 m hurdles	men
3000 m steeplechase	men
4×100 m relay	men	women
4×400 m relay	men
Road events
Marathon	men
20 km walk	men
Field events
High jump	men	women
Pole vault	men
Long jump	men	women
Triple jump	men
Shot put	men	women
Discus throw	men	women
Hammer throw	men
Javelin throw	men	women
Combined events
Decathlon	men
v t e

The men's 400 metres event at the 1963 Pan American Games was held at the Pacaembu Stadium in São Paulo on 27 and 28 April.

Medalists

Gold	Silver	Bronze
James Johnson  United States	Mel Spence  Jamaica	Clifton Bertrand  Trinidad and Tobago

Results

Heats

Rank	Heat	Name	Nationality	Time	Notes
1	1	Hortensio Fucil	Venezuela	47.41	Q
2	1	Earl Young	United States	47.85	Q
3	2	James Johnson	United States	48.85	Q
4	2	Clifton Bertrand	Trinidad and Tobago	49.06	Q
5	3	Mel Spence	Jamaica	49.54	Q
6	2	Peter Ostermeyer	Brazil	49.95
7	1	Geraldo Costa	Brazil	50.12
8	1	Victor Gadea	Uruguay	50.19
9	3	Didier Mejía	Mexico	54.75	Q
	1	Alejandro Arroyo	Ecuador	DNS
	1	German Guenard	Puerto Rico	DNS
	2	Malcolm Spence	Jamaica	DNS
	2	Victor Flores	Venezuela	DNS
	3	Jaime Frasser	Ecuador	DNS
	3	Juan Carlos Dyrzka	Argentina	DNS
	3	Edwin Roberts	Trinidad and Tobago	DNS

Final

Rank	Name	Nationality	Time	Notes
	James Johnson	United States	46.80
	Mel Spence	Jamaica	46.94
	Clifton Bertrand	Trinidad and Tobago	47.43
4	Didier Mejía	Mexico	48.28
5	Hortensio Fucil	Venezuela	48.58
	Earl Young	United States	DNS

References

1. Full results
2. "Track and Field Statistics". trackfield.brinkster.net. Retrieved 29 June 2020.

• Athletics at the 1963 Pan American Games
• 400 metres at the Pan American Games