2:29pm: Correction: the Sox are interested in Nationals closer Joel Hanrahan, not Lannan.
1:00pm: WSCR Radio in Chicago reports that the White Sox are interested in 23 year-old Nationals lefty John Lannan. Jon Heyman has heard the same. He has a fine 3.33 ERA in 119 innings this year. Not much of a strikeout rate though.