Alberto A. Arias is a professional baseball player from the Dominican Republic who plays as a pitcher. Playing in the youth leagues in his home country, Arias came to the United States in 2000 when he was signed by the Colorado Rockies at the 2000 MLB Amateur Draft. Playing through the minors, Arias only made his debut for the Rockies in 2007, as a relief pitcher. He made 6 appearances and had a 1-0 record and a 4.91 ERA.
At the end of the season, Arias was claimed off waivers by the Houston Astros and then assigned to the AAA-Division with the Round Rock Express. After just 4 games with the Express at the start of the 2009 season, Arias was named to the MLB roster and has, since, played 42 games for the Astros at an ERA of 3.35 in 45.2 innings pitched.