Bray Wyatt suffered a minor arm injury at last week's WWE NXT tapings in Winter Park, Florida.
The injury occurred while working with Luke Harper and Erick Rowan against Adrian Neville, William Regal and Corey Graves in a match that will air on the July 11, 2013 episode of WWE NXT.
As a result, Wyatt was replaced in the dark match main event later in the night by Luke Harper against Sheamus. The same thing happened on this weekend's WWE live events with Harper replacing Wyatt in matches against Alex Riley. They're doing a bit where Wyatt says he'll wrestle Riley if he can beat Harper. When Harper goes over, he "doesn't have" to work.
The fact Wyatt remains on the road with WWE indicates the injury is not serious and he's been pulled for precautionary measures.