The Marlins placed King on the 15-day injured list Thursday with a left lateral ankle sprain.
It's unclear when or how King was hurt, but the injury will cost him at least the next two weeks of action. The lefty reliever has provided quality work out of the Marlins' bullpen, posting a 2.48 ERA, 0.75 WHIP and 30:10 K:BB over 40 innings.