A "non-baseball related medical issue" has sent Jason Waddell to the DL. Jake Fox has been recalled. From the press release:
The Chicago Cubs today recalled infielder/outfielder Jake Fox from Triple-A Iowa and placed left-handed pitcher Jason Waddell on the 15-day disabled list (retroactive to June 13) for evaluation and treatment of a non-baseball related medical issue.
Fox, 26, begins his second stint with the Cubs, having batted .417 (5-for-12) with two doubles and two RBI in eight games for Chicago from May 27-June 9. He was 5-for-6 (.833) with two doubles and a RBI as a pinch-hitter and started one game in right field and made two appearances at third base.