The Astros have claimed right-hander Lucas Harrell from the White Sox, according to Zachary Levine of the Houston Chronicle (Twitter link). The move fills Houston's 40-man roster and creates a spot on Chicago's roster, which now stands at 37.
The White Sox selected Harrell in the fourth round of the 2004 draft and the 26-year-old has had brief stints in the majors in each of the past two seasons. In 29 big league innings, he has a 5.28 ERA with 6.2 K/9 and 5.6 BB/9 and over the course of seven minor league seasons, Harrell has a 3.79 ERA with 6.0 K/9 and 4.3 BB/9.