8:39pm: Then again, maybe they won't. There has been very little recent dialogue between the D-Backs and Mateo, a source tells Nick Piecoro of the Arizona Republic (via Twitter). He adds that no indications of a signing are imminent.
8:22pm: The Diamondbacks may sign outfielder Wagner Mateo by the end of April, tweets Melissa Segura of Sports Illustrated. Mateo worked out for Arizona (and other teams) in mid-March, though we heard recently that the club did not expect to sign him.
The Dominican slugger signed with the Cardinals in July of last year, but GM John Mozeliak ripped up the deal over concerns about his vision. Since then, other teams have been linked to the 17-year-old, including the Giants, who were said to be in pursuit of Mateo prior to his accord with St. Louis.
Mateo was set to earn $3.1MM under his old deal with the Cards.