 The main role of the lock in line-outs is to make a standing jump, often supported by the other forwards, to either collect the thrown ball or ensure the ball comes down on their side.Locks also have an important role in the scrum, binding directly behind the three front row players and providing forward drive.The back row, not to be confused with ‘Backs’, is the third and final row of the forward positions, who are often referred to as the loose forwards.