Orlando Ramirez / USA TODAY Sports

In arguably one of the biggest spots of his young career, 22-year-old Edwin Diaz delivered.

The Puerto Rico closer struck out United States second baseman Josh Harrison with an 86-mph slider for the final out of a 6-5 win that clinched Puerto Rico a spot in the semifinals at the World Baseball Classic.

Diaz entered the inning with a 6-3 lead and immediately issued a five-pitch walk to Nolan Arenado. Eric Hosmer followed with a single to put two men on with no outs. Diaz then got Buster Posey and Paul Goldschmidt to strikeout.

With two outs, Brandon Crawford tripled to make it 6-5. Crawford appeared to be out while sliding into third, but umpire Edgar Estivision ruled him safe. Diaz would strikeout Harrison to end the threat, however, and the game.

(Video courtesy: MLB.com)