Arsenal had gone two goals ahead at Upton Park before Carroll equalised in the opening half before completing his hat - trick after the interval to earn an eventual 3 - 3 draw .
Carroll was making his first start for three months .
Arsenal had gone two goals ahead at Upton Park before Carroll , who was making his first start for three months , equalised in the opening half before completing his hat - trick after the interval to earn an eventual 3 - 3 draw .