LeBron James versus the Boston Celtics in the playoffs: seven series from 2008 to 2018, the two losses in Cleveland, the Miami wins, the 2018 Game 7, and his 2026 move to Philadelphia

Lessons4 lessons

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Quiz

Final assessmentAfter the last lesson, for your diploma

About

“LeBron James versus the Boston Celtics in the playoffs: seven series from 2008 to 2018, the two losses in Cleveland, the Miami wins, the 2018 Game 7, and his 2026 move to Philadelphia” is a 4-lesson course at Teen level, created with soclever, a personal AI teacher. Each lesson takes a few minutes and ends with a check-in question; finish the curriculum and you can take a certificate test to earn a diploma. Try the first lesson without an account — or make your own course on any topic. Shared by @meirrosenschein.

What you'll learn

LeBron vs Boston: The Rivalry. Seven series against one franchise sounds like one rivalry. It was closer to three.
Cleveland's Two Heartbreaking Losses. Both of these losses happened in the same round. 2008 and 2010 were Eastern Conference semifinals, and Boston ended Cleveland's season both times. Start with 2008.
Miami's Dominance Over Boston. His scoring peak against Boston did not change when he got to Miami. The team around it did. In 2011 Miami met Boston in the Eastern Conference semifinals and won 4-1.
2018 Game 7, Then Philadelphia. 2008 and 2018 were do-or-die Game 7s in the same building, ten years apart, and they ended in opposite directions.

Lesson 1: LeBron vs Boston: The Rivalry

Seven series against one franchise sounds like one rivalry. It was closer to three.

Boston is the opponent LeBron James has faced most in playoff history: seven series, 41 games, and a 25-16 record across those games. Five of the seven series he won, two he lost.

The order matters, because the two losses came first. In 2008 and again in 2010 he was in Cleveland, and Boston ended the season in the Eastern Conference semifinals, 3-4 and then 2-4. The five that followed went the other way. Miami beat Boston 4-1 in the 2011 East semifinals and 4-3 in the 2012 East finals. Back in Cleveland, he swept a rebuilding Celtics team 4-0 in the 2015 first round, won the 2017 East finals 4-1, and won the 2018 East finals 4-3.

Here is the part that reframes that list. He was not playing one team seven times. He played three distinct eras of a single franchise's roster: the Pierce, Garnett and Allen team, the rebuild, and the Tatum and Brown team. This rivalry is a record of how much of a roster can turn over while a matchup keeps its name.

One milestone sits inside the run. In the clinching Game 5 of the 2017 series, he passed Michael Jordan for the most points in playoff history. That record was set against the opponent he has faced most in playoff history.

Questions this course answers

How many playoff series did LeBron James play against the Boston Celtics?

He has faced Boston in seven playoff series, totaling 41 games with a 25-16 record.

What happened in the two playoff series losses in Cleveland?

Boston ended Cleveland's season in the Eastern Conference semifinals in 2008 with a 3-4 score and in 2010 with a 2-4 score.

How did Miami perform against Boston in their playoff series?

Miami beat Boston 4-1 in the 2011 East semifinals and 4-3 in the 2012 East finals.

What was the result of the 2018 Game 7 against Boston?

Cleveland won the 2018 Eastern Conference finals 4-3 after taking Game 7 on the road in Boston with an 87-79 score.

When did LeBron James announce his move to Philadelphia?

On Friday July 24, 2026, he announced on X that he had signed with the Philadelphia 76ers for two years and $8 million.

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