White Sox manager Robin Ventura confirmed Wednesday that he's viewing Matt Thornton as his closer. "It's open, but right now I would say Matt is probably the guy to do that," Ventura told WSCR-AM 670 in Chicago. Thornton, a 35-year-old left-hander, has a 2.84 ERA and 1.10 WHIP in 260 innings since the start of the 2008 season. He should do just fine in the ninth inning.