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Ariel Prieto returns for his third season on the A's coaching staff. It is his 11th season with the A's organization, which includes six years as a player.

Prieto began his coaching career as a pitching coach with the A's Arizona Rookie League affiliate in 2009. He spent three seasons there and was slated to spend 2012 with Single-A Vermont of the short season New York-Penn League. Prieto was added to the A's Major League coaching staff after the signing of Yoenis Céspedes.

A former A's first round draft selection in 1995, Prieto was selected by the A's with the fifth overall pick in the June draft after arriving from Cuba in April. He spent five seasons with Oakland from 1995-2000 and was 15-24 with a 4.88 ERA in 67 games, including 60 starts. The right-hander was the A's Opening Night starter in 1997 and made a career-high 22 starts. His six wins that year matched his career-high from the previous season and were the most by an A's starter. Prieto made just two starts in 1998 and missed the 1999 season after undergoing "Tommy John" surgery. He returned to pitch in eight games in 2000 and finished his Major League career with three relief appearances with Tampa Bay in 2001. From 2003-05, Prieto played in the minor leagues in the Pittsburgh, Detroit and Florida organizations. He was with a winter league team in Mexico in 2006.

Prieto is a graduate of Fajardo University in Isle of Pines, Cuba. He was a member of the Cuban National team from 1990-94, where he set the national team record for strikeouts in one game when he fanned 20 at Nicaragua in 1990. Prieto was undefeated in international play with a record of 11-0.

A native of Havana, Cuba, Prieto makes his offseason home in Miami with his son, Ariel, and daughter, Melanea.

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