Astudillo signed a minor league contract with the Diamondbacks on Friday, Matt Eddy of Baseball America reports.
The 25-year-old will fill a depth need within the organization -- he's not a contender for a significant major league role. Astudillo hit .267/.293/.332 with the Braves' Double-A Mississippi affiliate last season while playing mostly behind the plate. He also made eight appearances at first base and two in right field.