Vásquez signed as an undrafted free agent in 2003 by the Arizona Diamondbacks.\n', '

Vásquez played for the Double-A Mobile BayBears in 2007. He started in all 29 games he played in and went 10-6 with a 2.99 ERA. Following the season, the Diamondbacks named Vásquez as their minor league pitcher of the year.[citation needed] His contract was purchased on November 20, 2007.\n', '

Vásquez was called up to the Diamondbacks on April 26, 2009, and made his Major League debut later that day.\n', '

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