Having the best starting five in the league does not necessarily yield an NBA title.
A strong second-unit not only gives the team flexibility, but it also allows for replacements in the case that a starter gets sidelined for a long time.
Allen and Posey brought specific skills to the table and allowed for Boston to withstand a deep postseason run without major injuries.
Here are the NBA's five deepest rosters heading into next season. Remember, just because the team is the deepest, doesn't necessarily mean that they are bringing home the title.