The Pirates designated Diaz for assignment Wednesday.
He'll cede his spot on the 40-man roster to another first baseman/designated hitter in Carlos Santana, who finalized a one-year deal with Pittsburgh on Monday. Though a rebuilding Pirates squad looked to be a good spot for the 26-year-old Diaz to potentially play regularly in 2023 and make good on his prospect pedigree, Pittsburgh ultimately won't give him that opportunity. Over multiple stints in the big leagues with the Marlins across each of the three seasons, Diaz produced a .244 wOBA in 343 plate appearances.