Kofi injured during the Smackdown tapings, not sure if kayfabe or legit. They say he's gone for about 4-8 weeks.
http://www.wwe.com/shows/smackdown/2013-05-31/kofi-injury-update-26118354
http://www.wwe.com/shows/smackdown/2013-05-31/kofi-injury-update-26118354