Gregori Emilio Aquino Valera (; ; born January 11, 1978) is a Dominican former professional baseball pitcher. He played in Major League Baseball (MLB) for the Arizona Diamondbacks, Milwaukee Brewers, Baltimore Orioles, and Cleveland Indians.
Career
Arizona Diamondbacks
Aquino was originally signed as a 16-year-old infielder in 1995, by the Arizona Diamondbacks. After spending the next decade in the Diamondbacks' farm system, he made his major league debut on July 2, 2004, against the Minnesota Twins. That year, he was 0–2 with 16 saves and a 3.06 earned run average in 34 games. He then spent the following two seasons with the Diamondbacks.
Milwaukee Brewers
On November 25, 2006, Aquino was traded to the Milwaukee Brewers alongside catcher Johnny Estrada and pitcher Claudio Vargas in exchange for outfielder Dave Krynzel, and pitchers Doug Davis and Dana Eveland. Aquino began the season on the Brewers roster, but was optioned to the Triple-A Nashville Sounds on April 21. He was later recalled by Milwaukee on August 31 to replace Manny Parra, who was placed on the disabled list. In 15 appearances with the Brewers, Aquino went 0–1 with a 4.50 ERA. After a poor performance in the first month of the season, the Orioles designated Aquino for assignment on April 29, and he cleared waivers and was assigned to Triple-A on May 1. He became a free agent at the end of the season.
Cleveland Indians
Aquino signed a minor league contract with the Cleveland Indians on January 14, 2009. He attended Indians spring training in 2009 but was sent to Minor League camp on March 24, 2009. In October 2009, Aquino was granted free agency.
Chicago White Sox
On December 14, 2009, Aquino signed a minor league contract with the Chicago White Sox.