The Orioles activated O'Neill (concussion) from the 7-day injured list Friday.
O'Neill hasn't played since April 8, as he initially missed time with an illness before fainting from dehydration and suffering a concussion. Prior to his time on the injured list, O'Neill slashed .241/.353/.345 with one home run, four RBI, six runs scored and a 3:6 BB:K across 34 plate appearances. Dylan Beavers and Leody Taveras have been seeing more playing time with O'Neill idle.