Robertson signed a minor-league deal with the Diamondacks on Wednesday, Chris Cotillo of SB Nation reports.
EDGE Analysis
Robertson has earned brief stints in the majors in each of the last four seasons, each with a diferent organization. The 32-year-old journeyman owns a .262/.314/.328 career slash line in 386 plate appearances. He doesn't look to be anything other than organizational depth for the Diamondbacks.