Schedule and 2023-24 Results:
Regular Season Records: Boston 64-18, Cleveland 48-34
Game 1 on Tuesday, 07 May: Cleveland loses at Boston, 120-pts-95
Game 2 on Thursday, 09 May: Cleveland wins at Boston, 118-pts-94
Game 3 on Saturday, 11 May: Boston wins at Cleveland, 106-pts-93
Game 4 on Monday, 13 May: Boston wins at Cleveland, 109-pts-102
Game 5 on Wednesday, 15 May: Cleveland loses at Boston, 113-pts-98

SERIES NOTES:

After Game 5: The Boston Celtics hosted and topped the Cleveland Cavaliers 113-pts-98 to complete a 4-games-1 best-of-7 MLB/NBA/NHL playoff series 1574 victory. With the series 1574 win, the Boston Celtics improve their best-of-7 NBA playoff series record to 76-32 overall and 25-8 (with an active four-Quarterfinals series winning streak) in the Quarterfinals round. With the series 1574 loss, the Cleveland Cavaliers see their best-of-7 NBA playoff series record fall to 24-13 overall and 8-5 in the Quarterfinals round. The win order for the victorious Boston Celtics in series 1574 was WLWWW: Series 1574 thus becomes the sixteenth NBA Quarterfinals-round series, the 35th NBA series (all rounds), and the 95th MLB/NBA/NHL series (all rounds) to follow that win order to completion. The Boston Celtics now have a perfect 30-0 best-of-7 NBA playoff series record upon having led 3-games-1.

After Game 4: The Boston Celtics visited and bested the Cleveland Cavaliers 109-pts-102 to take a best-of-7 MLB/NBA/NHL playoff series 1574 lead of 3-games-1. When leading a best-of-7 MLB/NBA/NHL playoff series 3-games-1, the Boston Celtics have a series record of 29-0 and a Game 5 record of 18-11. When trailing a best-of-7 MLB/NBA/NHL playoff series 3-games-1, the Cleveland Cavaliers have a series record of 1-3 and a Game 5 record of 2-2. In best-of-7 NBA playoff series, the Cleveland Cavaliers now have active four-Game 3 and four-Game 4 losing streaks (irrespective of Games 1-2 outcomes). Trailing a best-of-7 NBA playoff series 3-games-1, the Cleveland Cavaliers achieved their sole best-of-7 NBA playoff series victory in series 1316, over the Golden State Warriors in the 2016 NBA Finals.

After Game 3: The Boston Celtics visited and bested the Cleveland Cavaliers 106-pts-93 to take a best-of-7 MLB/NBA/NHL playoff series 1574 lead of 2-games-1. When leading a best-of-7 MLB/NBA/NHL playoff series 2-games-1, the Boston Celtics have a series record of 46-5 and a Game 4 record of 20-31. When trailing a best-of-7 MLB/NBA/NHL playoff series 2-games-1, the Cleveland Cavaliers have a series record of 6-6 and a Game 4 record of 9-3. Leading a best-of-7 NBA playoff series 2-games-1, the Boston Celtics suffered two of their five series losses in such series to the Cleveland Cavaliers (in series 616, in the 1992 NBA Quarterfinals; in series 1380, in the 2018 NBA Semifinals). With their series 1574 Game 3 loss, the Cleveland Cavaliers now have an active four-Game 3 losing streak (irrespective of Games 1-2 outcomes) in best-of-7 NBA playoffs.

After Game 2: The Cleveland Cavaliers visited and defeated the Boston Celtics 118-pts-94 to knot best-of-7 MLB/NBA/NHL playoff series 1574 at 1-game-all. When tied 1-game-all in a best-of-7 MLB/NBA/NHL playoff series, the Boston Celtics have a series record of 31-15 and a Game 3 record of 25-21, while the Cleveland Cavaliers have a series record of 5-5 and a Game 3 record of 4-6. In the history of best-of-7 NBA playoff series, teams such as the Boston Celtics in series 1574 which win Game 1 by 20+ points but lose Game 2 by 20+ points have a 0-4 series record. The Celtics themselves lost two of those four series, in series 273 to the New York Knickerbockers in the 1973 NBA Semifinals, and in series 1409 to the Milwaukee Bucks in the 2019 NBA Quarterfinals.

After Game 1: The Boston Celtics hosted and topped the Cleveland Cavaliers 120-pts-95 to take a best-of-7 MLB/NBA/NHL playoff series 1574 lead of 1-game-nil. When leading a best-of-7 MLB/NBA/NHL playoff series 1-game-nil, the Boston Celtics have a series record of 61-8 and a Game 2 record of 43-26. When trailing a best-of-7 MLB/NBA/NHL playoff series 1-game-nil, the Cleveland Cavaliers have a series record of 6-11 and a Game 2 record of 7-10. In the history of best-of-7 NBA playoff series, teams such as the Boston Celtics which win Game 1 at home by 25 points have a series record of 8-2; interestingly, one of the two series losses was sustained in series 1380 by the Boston Celtics, to the Cleveland Cavaliers in the 2018 NBA Semifinals.

Pre-series assessment: In the 2023-24 NBA regular season, the Boston Celtics finished 16 games ahead of the Cleveland Cavaliers. From 1947 through the 2024 NBA Preliminary round, when NBA teams led their best-of-7 playoff series opponents by 16 regular-season games, they have posted a best-of-7 playoff series record of 13-2 (.867) with an active five-series winning streak in those series against those opponents. MLB/NBA/NHL best-of-7 playoff series 1574 is the 108th best-of-7 NBA playoff series for the Boston Celtics, and the 37th for the Cleveland Cavaliers. In best-of-7 NBA playoff series, the Boston Celtics have an all-rounds series record of 75-32, a Quarterfinals-round series record of 24-8, and a Game 1 record of 69-38, while the Cleveland Cavaliers have an all-rounds series record of 24-12, a Quarterfinals-round series record of 8-4, and a Game 1 record of 19-17. Series 1574 is the eighth best-of-7 NBA playoff series meeting between the Boston Celtics and the Cleveland Cavaliers. Cleveland leads 4-3 in series record in their previous seven best-of-7 NBA playoff series against Boston, and has a three-series winning streak in such series against the Celtics; the last Boston best-of-7 NBA playoff series victory over Cleveland was in series 1112, in the 2010 NBA Quarterfinals en route to a berth in the 2010 NBA Finals.