The Detroit Tigers have not stopped trying to shore up their shaky bullpen.

According to MLB.com, the Tigers have claimed Houston Astros closer Chad Qualls on a revocable waiver claim. Detroit now has until Wednesday to strike a deal for the 36-year-old.

Qualls has saved 14 of 17 opportunities this season with a 3.07 ERA. In 44 innings, Qualls has walked only five batters, two of them intentionally.

He is under contract through the 2015 season and his deal includes a $3.5 million option for the 2016 season.

Detroit has been looking for bullpen help with closer Joe Nathan having an erratic season and Joakim Soria on the disabled list. Former Baltimore Orioles closer Jim Johnson signed a minor league deal with Detroit on Aug. 7. While he earned a win over the weekend, Johnson, like Nathan, has been unreliable during his short stint with the Tigers.