The Chicago White Sox have claimed left-handed pitcher Leyson Septimo off waivers from the Arizona Diamondbacks and optioned him to Class AA Birmingham.
Septimo, 25, was 2-1 with a 6.37 ERA (21 ER/29.2 IP) and 22 strikeouts in 21 relief appearances with Class AA Mobile in 2011. He also limited opponents to a .202 (20-99) average, including a .186 (13-70) mark by righties.
The 6-foot-1, 195-pounder went 6-8 with a 5.79 ERA (111 ER/172.2 IP), 14 saves and 192 strikeouts in 135 relief appearances over four minor-league seasons in the Diamondbacks farm system (2008-11).
Septimo, who was originally signed as a free agent on February 19, 2003, was selected to participate in the 2009 All-Star Futures Game and named to the 2010 midseason Southern League All-Star Team.