Adrian Alaniz (born March 12, 1984 in Sinton, Texas) is an American professional baseball player. A graduate of Sinton High School, he is a right-handed pitching prospect in the Washington Nationals organization.
Alaniz attended the University of Texas from 2004 to 2007. He was selected by Washington in the eighth round of the 2007 amateur entry draft.
In 2007, Alaniz pitched for the Vermont Lake Monsters in the short-season New York–Penn League. He logged 60⅓ innings in eight starts and five relief appearances, winning 8 games, losing 2, and recording a 2.39 ERA. During that span, he struck out 62 batters while issuing only eight bases on balls.
He was promoted to the Potomac Nationals in the advanced class-A Carolina League in 2008. As of June 2, 2008, he had compiled an 8-0 record and a 2.43 ERA over 59⅓ innings in 11 starts at Potomac, striking out 54 batters and walking 23.
In 2009, at the Harrisburg Senators in class-AA East League, he was 3-4 with a 4.76 ERA. He had a bad May, going 1-3 with an 8.14 ERA in 21 Innings Pitched over 6 starts. Thereafter, he pitched mostly out of the bullpen with a 1.14 ERA over 39 and 2/3 innings.