Short answers, pulled from the story.
The Big Three consisted of Ray Allen, Kevin Garnett, and Paul Pierce. This trio was assembled by general manager Danny Ainge in the 2007 off-season to transform the franchise.
Paul Pierce collided with teammate Kendrick Perkins in the third quarter and left the game in a wheelchair before returning to score 15 points in the fourth quarter. The event became known as the Wheelchair Game and helped secure a 98 to 88 victory for Boston.
Leon Powe scored 21 points in just 15 minutes of action while taking ten free throws within his first three minutes on the floor. His physical style and back-to-back poster slams shifted momentum decisively toward Boston.
The Celtics defeated the Lakers on the 17th of June 2008 by a margin of 39 points to claim their 17th title. This victory set a record for the largest ever margin in an NBA championship-clinching game.
Kevin Garnett suffered a devastating right knee injury shortly after the 2009 All-Star Game which halted the team's momentum. The franchise lost to the Lakers again in 2010 before returning to the Finals 12 years later in 2022.