On July 15, 2005, Quintanilla was traded along with outfielderEric Byrnes to the Colorado Rockies in exchange for pitchersJoe Kennedy and Jay Witasick. The Rockies subsequently assigned him to the Colorado Springs Sky Sox of the Triple-APacific Coast League (PCL). and promoted him to the majors in late July. He made his debut on July 31 and went 1–3. In each of the next three seasons, Quintanilla began the season with Triple-A Colorado Springs and was promoted to the majors at least once each season. In limited at-bats, he had his highest batting average in 2008 at .238.
The Office of the Commissioner of Baseball announced August 11, 2010, that Quintanilla had received a 50-game suspension after testing positive for Methylhexaneamine, a performance-enhancing substance, in violation of the Minor League Drug Prevention and Treatment Program.[2]
Texas Rangers
On December 4, 2010, Quintanilla signed a minor league contract with the Texas Rangers. On July 8, 2011, he had his contract purchased by Texas after hitting .298 in 51 games with Round Rock Express of the PCL. On September 1, Quintanilla was removed from the 40-man roster and sent outright to Round Rock, but rejected the assignment and elected free agency.[3] Overall with the Rangers, he hit .045 in 11 games, with two RBI.
On July 20, 2012, Quintanilla was traded to the Baltimore Orioles in exchange for financial considerations.[6] In 36 appearances for Baltimore, he primarily played 2nd base, and batted .232/.284/.354 with three home runs and 12 RBI.
New York Mets (second stint)
On January 5, 2013, Quintanilla signed a minor league contract with the New York Mets that included an invitation to spring training.[7] His contract was purchased and he was subsequently called up on May 30, when shortstopRuben Tejada was placed on the 15-day disabled list.[8] In 95 appearances for the Mets, Quintanilla batted .222/.306/.283 with two home runs, 21 RBI, and two stolen bases. He became a free agent on December 2, after being non-tendered.[9]
On January 18, 2014, Quintanilla re-signed with the Mets organization on a minor league contract.[10] On March 29, the Mets selected Quintanilla's contract after he made the team's Opening Day roster.[11] In 15 games for New York, he went 6-for-29 (.207) with 3 RBI. On May 8, Quintanilla was designated for assignment by the Mets.[12] He elected free agency on October 1.[13]
Colorado Rockies (second stint)
On January 30, 2015, Quintanilla signed a minor league contract with the Colorado Rockies. He was released on June 15, after appearing in only two games for the High-A Modesto Nuts.[14]
Toros de Tijuana
On December 2, 2015, Quintanilla signed with the Toros de Tijuana of the Mexican League. In 7 games for Tijuana in 2016, he went 5-for-21 (.238) with one home run, three RBI, and one stolen base.
Quintanilla played in 2 games for the Toros in 2017, going 0-for-2 with 1 walk. He became a free agent following the season.
