About two months ago, a small pocket of Celtics players engaged in one of the basketball world’s most popular debates: Michael Jordan or LeBron James?



Back and forth the Celtics went, arguing who deserves the title of greatest player ever. They cited stats, clutch moments, number of rings — all the same things anyone else mentions in the discussion. The sides the players took will remain a secret for now, but the Celtics, like everyone else, know all about James’ greatness.



When Game 5 of the Eastern Conference Finals arrived Wednesday night, the Celtics understood exactly what they were up against. They knew the game would be the biggest inside TD Garden since Game 6 of the same round in 2012 — and that James had essentially maimed the Big Three that night. They realized James has reached seven straight NBA Finals, won three of those, and averaged about 30 points and a triple-double regardless of the opponent. They understood the importance...