Agustín Alcantara Montero (born August 26, 1977) is a Dominican former professional baseball pitcher.

He played in Major League Baseball (MLB) for the Chicago White Sox.

On April 20, 2005, Montero became the third player to test positive under Major League Baseball's new steroid policy, and was suspended for 10 days without pay.

[1] Although he had not played in the Major Leagues at that time, he was on the Rangers' 40-man roster during spring training, and was subject to random testing.

This biographical article relating to a Dominican Republic baseball pitcher is a stub.