He's similar to Ball but a bit younger. Difficult to judge what Ball would have done though, if he had not been injured/ ill early season. Ball scored 14 goals for Fleetwood in 2016/7 in League 1. Would he have managed the same or better for the Millers if he had been fully fit? Just about impossible to tell which is the better of the two. Possibly worth keeping Lavery if some of the other forwards go, but it's not a clear cut decision.