Carlos Mario Álvarez Sánchez (born 12 September 1956) is a Cuban sprinter. He competed in the men's 4 × 400 metres relay at the 1976 Summer Olympics.^[1] He won a silver medal at the 1975 Pan American Games in the 4 x 400 metres relay.

Year	Competition	Venue	Position	Event	Notes
Representing  Cuba
1975	Pan American Games	Mexico City, Mexico	2nd	4 × 400 m relay	3:02.82
1976	Olympic Games	Montreal, Canada	7th	4 × 400 m relay	3:03.81
1978	Central American and Caribbean Games	Medellín, Colombia	6th	400 m	46.72
			3rd	4 × 400 m relay	3:05.57
1979	Pan American Games	San Juan, Puerto Rico	12th (sf)	400 m	47.26
			3rd	4 × 400 m relay	3:06.3

• 400 metres – 46.3 (1976)

• Carlos Álvarez at World Athletics
• Carlos Álvarez at Olympedia

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