Celtics vs Cavaliers Prediction, Odds & Pick (Oct 8, 2026)

SetupThe setup

The Celtics and the Cavaliers meet at Rocket Arena for a preseason game. Tip-off is set for 7:00 PM EDT, which is 07:00 on Oct 9 in UTC+8.

Preseason records coming in were 0-0 for the Celtics and 0-0 for the Cavaliers.

Model vs marketModel vs Polymarket

Polymarket had the Celtics at 57.5¢ and the Cavaliers at 42.5¢. The last-season NBA model put the Cavaliers at 52.3%. On paper that's +9.3¢ at the ask. In this spot that number is context, not a signal.

Liquidity on the market was about $47K when we pulled the book (Oct 8, 2026, 21:52 UTC+8).

MatchupInside the model

The model runs on 2025-26 team ratings. In that data, the Celtics went 56-26 with a +7.9 net rating (117.7 offense, 109.8 defense) and a 8-2 last-10 mark; the Cavaliers went 52-30 with a +4.0 net rating (117.4 offense, 113.3 defense) and a 7-3 last-10 mark.

Put together, it projects the Cavaliers by 1.1 points, and that includes 3.5 points of home court.

Most recent meetings in the data: Mar 8, 2026, Celtics won scoring 109; Nov 30, 2025, Celtics won scoring 117; Oct 29, 2025, Celtics won scoring 125.

None of that knows who is actually playing tonight. The NBA model is not lineup-aware.

BooksThe wider market

DraftKings had BOS -3.5 with the total at 221.5. Strip the vig and that's 41.7% for the Cavaliers.

That leaves the model 10.6 points above the books on the Cavaliers. The market and the sportsbooks are telling the same story here; the model is the one going against it.

AvailabilityWho's in, who's out

Nothing recent or Out-status on ESPN's injury feed for either side at snapshot time.

VerdictThe call

This is a no-pick game. Preseason NBA is excluded from leans because the last-season model can't see rest days or rotation experiments, which is most of what decides these games. The Cavaliers number (+9.3¢ at the ask) is background only.