The Boston Celtics open the 2026-27 NBA season with an over/under of 51.5 in the NBA win totals market at the BetMGM online sportsbook.
Celtics Over/Under Wins 2026-27
Celtics Win Total Prediction
- Under 51.5 wins (-105) — Pick made on Aug. 19
I like the under on the Celtics’ win total, especially now that it’s climbed to 51.5 after opening as low as 49.5.
The market’s favoring Boston makes sense, as head coach Joe Mazzulla has a track record of regular-season success. The Celtics have averaged 59.5 wins in his four seasons at the helm, with their worst win total being last year’s 56-26 finish.
However, I prefer the under on Boston’s win total because the Eastern Conference is much more competitive, and the team just traded away Jaylen Brown in the offseason.
The Celtics are one of four teams with a preseason over/under above 50. That hasn’t happened since the 2022-23 campaign, which speaks to how competitive the top of the East projects to be this year. The conference is also deep, with 10 teams having an over/under of 43.5 or higher.
And that context matters because Boston traded away a key regular-season player. Brown made 395 starts for the Celtics over the last six years, averaging 34.3 minutes per game. The Celtics traded him for Paul George, who is 36 and has missed 86 contests over the past two years.
If George struggles with availability again, it puts too much pressure on Jayson Tatum in his first full season since suffering an Achilles injury. He no longer has an obvious sidekick, especially if Derrick White struggles to find his shot after a down year in 2025-26.
Boston should win a lot of games, but don’t be surprised if they take a small step back in a more competitive landscape this season.
Celtics Win Total History
(Data from Sports Odds History)
| Year | Win Total | Actual Wins | Result |
|---|---|---|---|
| 2025-26 | 41.5 | 56 | Over |
| 2024-25 | 58.5 | 61 | Over |
| 2023-24 | 54.5 | 64 | Over |
| 2022-23 | 54.5 | 57 | Over |
| 2021-22 | 45.5 | 51 | Over |
| 2020-21 | 44.5 | 36 | Under |
| 2019-20 | 48.5 | 48 | Void |
| 2018-19 | 59 | 49 | Under |
| 2017-18 | 53.5 | 55 | Over |
| 2016-17 | 52.5 | 53 | Over |
| 2015-16 | 45.5 | 48 | Over |
| 2014-15 | 27 | 40 | Over |
| 2013-14 | 28.5 | 25 | Under |
| 2012-13 | 51.5 | 41 | Under |
| 2011-12 | 40.5 | 39 | Under |
| 2010-11 | 52.5 | 56 | Over |
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