The gifted but inconsistent performer's relationship with his club and manager have often been strained, prompting Mancini to once remark after a match that if Balotelli had been a teammate during his own playing days, he may have given him a punch in the head every day.
Reid's delivery from out wide posed another problem for the Baggies after 29 minutes when keeper Scott Carson could only punch his cross on the head of the incoming Carlos Edwards, but he diverted his finish over the bar.
John Tavares got caught throwing a punch to the back of the head of Carl Hagelin, drawing a roughing penalty that had the young Islanders star slamming his stick as he entered the penalty box.