Néstor Isaías Chávez Silva (July 6, 1947 - March 16, 1969) was a Venezuelan right-handed starting pitcher who played in Major League Baseball for the San Francisco Giants in 1967.

Chávez was nicknamed "Látigo" (whip) in his homeland, both for his stunning and sharp fastball.

Listed at 6 feet (1.83 m), 170 pounds (77 kg), Chávez was one of the best pitching prospects in the Giants farm system.

In two games with the Giants, he compiled a 1–0 record with three strike outs and a 0.00 ERA in five innings.

However, on March 16 of that year, Chávez died in Maracaibo, in one of the worst aircraft tragedies in Venezuelan history, after Viasa Flight 742 crashed while taking off, killing all 84 aboard and 71 on the ground including Chávez.