Los Angeles Dodgers lefthanded reliever Hong-Chih Kuo, who went on the disabled list with an anxiety disorder termed the “yips” over a month ago, was activated for Sunday’s game against the Astros, per the Dodgers’ official Twitter feed.

SB Nation’s Dodgers blog True Blue LA reports that Kuo had a successful rehab assignment:

After a few weeks of throwing in Arizona, Kuo pitched in four games rehab assignment, with both Single A Rancho Cucamonga and Triple A Albuquerque. During the rehab assignment, Kuo allowed two baserunners in 3 2/3 innings and struck out seven of the 14 batters he faced.

In a corresponding roster move, the Dodgers optioned reliever Ramon Troncoso to Triple-A Albuquerque. They also placed catcher Rod Barajas on the disabled list and recalled catcher A.J. Ellis, who will back up Dioner Navarro.

Via tweet from Brad Evans, fantasy sports columnist for Yahoo, Dodgers manager Don Mattingly is expected to install Kuo as the team’s closer.