No. 7 prospect, punctuated his four-hit Friday night with a three-run walk-off home run, powering Triple-A Oklahoma City to an 8-5 victory against Omaha. After Omaha scored once in the top of the ninth to tie the game at five, Austin Wates led off the bottom of the inning with a single. A sacrifice bunt moved Wates to second base and the Storm Chasers chose to intentionally walk Marc Krauss to get to Santana. The right-hander took a first-pitch strike before driving the game-winning homer out to right field."/>

Prospect Santana collects four hits at Triple-A

Prospect Santana collects four hits at Triple-A

Outfielder Domingo Santana, the Astros' No. 7 prospect, punctuated his four-hit Friday night with a three-run walk-off home run, powering Triple-A Oklahoma City to an 8-5 victory against Omaha.

After Omaha scored once in the top of the ninth to tie the game at five, Austin Wates led off the bottom of the inning with a single. A sacrifice bunt moved Wates to second base and the Storm Chasers chose to intentionally walk Marc Krauss to get to Santana. The right-hander took a first-pitch strike before driving the game-winning homer out to right field.

Santana, ranked No. 93 on MLBPipeline.com's Top 100 Prospects list, finished the night 4-for-5 with three runs and three RBIs. It was his second four-hit game of the season.

Outfielder Preston Tucker, the Astros' No. 20 prospect, went 1-for-4 with an RBI and stole his first base since being promoted to Oklahoma City two weeks ago.

At just 21 years old, Santana is the second-youngest regular in the Pacific Coast League this season. But he has held his own against the older competition. In 81 games this season, he is hitting .303/.382/.505 with 13 home runs.

Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. Teddy Cahill is a reporter for MLB.com. Follow him on Twitter at @tedcahill. This story was not subject to the approval of Major League Baseball or its clubs.