Tate was recalled from Triple-A Norfolk on Friday.
Tate was brought up to take the roster spot of Shawn Armstrong (forearm), who landed on the injured list in a corresponding move. Tate has appeared in two games with the Orioles this season, and has allowed six earned runs over five innings, good for a 10.50 ERA. Given that he threw multiple frames in both his last two appearances, Tate figures to slot into a long-relief role for the big club.