Watch: Diaz records final out to send Puerto Rico into semis

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 strike out Harrison to end the threat, however, and the game.

(Video courtesy: MLB.com)