The Orioles recalled Nunez from Triple-A Norfolk on Sunday.
Nunez has been up and down between the majors and minors this season and has posted a 4.29 ERA, 1.31 WHIP and 55:25 K:BB over 50.1 innings spanning 44 relief appearances while with the big-league club. He's been deployed mainly in low-leverage situations but does have three wins, three saves and seven holds. Nunez is taking the active-roster spot of Luis Robert, who landed on the 10-day IL due to a hamstring injury.