The Rangers claimed Ramon Aguero off of waivers from the Pirates, according to Jeff Wilson of the Fort Worth Star-Telegram (on Twitter). Texas optioned the right-hander to Triple-A and moved Omar Beltre to its 60-day DL.
Pittsburgh designated Aguero for assignment last week after optioning him to Double-A earlier in March. Aguero posted a 6.14 ERA with 7.7 K/9 and 5.2 BB/9 in 29 1/3 innings at Class A and Double-A last year. The 26-year-old Dominican has a 4.14 ERA with 7.9 K/9 and 3.4 BB/9 in parts of five pro seasons.