Rangers optioned RHP Mark Hamburger to Triple-A Round Rock. The Rangers also reassigned right-hander Sean Green to minor league camp. Hamburger posted a 4.50 ERA and an ugly 1/6 K/BB ratio over 10 innings this spring. He'll continue to serve as relief depth in the minor leagues.

Mark Hamburger and Michael Kirkman will not be on the ALDS roster against the Rays. This means at least one of Yoshinori Tateyama, Scott Feldman and Darren O'Day will make the roster. Hamburger and Kirkman are being sent to the instructional league to stay sharp, so they could return if the Rangers advance to the ALCS.

Rangers purchased the contract of RHP Mark Hamburger from Triple-A Round Rock. The Rangers still have to clear a spot for him on the 40-man roster. Hamburger, who was originally acquired from the Twins in the Eddie Guardado deal in 2008, posted a 3.39 ERA and 70/25 K/BB ratio over 82 1/3 innings this season between Double-A Frisco and Triple-A Round Rock. He'll pitch in a middle relief role.