In professional sports where teams are subject to a "draft" system, it is common to talk about a "window of opportunity", i.e. a year or two when the team has the realistic opportunity to win the title owing to the talent, maturity and experience of their players. For many teams "outside the window", coaches and management will often talk about the "rebuilding phase" - a period where the team is re-building their playing ranks with the aim of giving them the opportunity to win again sometime in the future. This article looks at the concept of "rebuilding" and challenges it as a valid philosophy in professional sport.