A second-round pick of the Astros in 2000, Qualls rose quickly through the minors and debuted with Houston in 2004. A hard thrower who worked as a set-up man in the bullpen, the Californian righthander compiled a record of 23-12 with six saves and a 3.39 ERA during a stint as an Astro from 2004-07.

Traded to Arizona, Qualls became a closer and bounced to Tampa Bay, San Diego, Philadelphia, the Yankees, Pittsburgh and Miami before signing as a free agent with Houston for 2014-15. During his second stint as an Astro, Qualls was 4-10 with a 3.84 ERA and 23 saves. Overall, he was a combined 27-22 with a 3.51 ERA and 29 saves with Houston.

He had two final seasons with the Rockies before retiring. For his 14-year career, Qualls posted a 52-48 record, a 3.89 ERA, 74 saves and a 109 ERA+.