The individual matchup picture is where this gets precise. James Harden is averaging 29.0 PPG across three games against Dallas this season, nine full points above his 19.9 season average. That delta exists for a specific reason: Thompson. When Thompson plays, he provides a credible perimeter answer for Harden's drive game. Without him, Dallas is deploying a perimeter rotation that cannot stay attached to Harden's 14.1 drives per game. He converts 49.3% at the rim and operates at 60.8% true shooting on the season. This Dallas defense, missing its best wing defender, has no structural answer for any of that.

Donovan Mitchell will likely draw Cooper Flagg as a primary matchup concern, and that assignment flips every meaningful number in Cleveland's favor. Flagg's catch-and-shoot 3-point percentage sits at 28.2%, which means Cleveland can help aggressively on his drives without surrendering open corner threes. In the paint, Evan Mobley faces a Dallas frontcourt missing Gafford entirely, leaving Flagg at 6.6 RPG as the primary board competition against a player averaging 8.7 rebounds per game this season against healthy frontcourts. Mobley put up 29 points in their earlier meeting. That ceiling rises further tonight.

Our model projects a 126.6-109.3 Cleveland win, implying a 17.3-point margin on a market line of -7.0. Dallas is 8-24 on the road this season with a -7.1 PPG away margin, bottom five in the league. The directional case for Cleveland is overwhelming. The real betting questions are about magnitude and whether a deep blowout compresses fourth-quarter scoring enough to affect the total.

• Dallas is missing Irving for the season, with Gafford (doubtful), Thompson (doubtful), and Washington (questionable) all likely absent. Flagg and Marshall will carry virtually the entire offensive load against a Cleveland defense that held this same Dallas team to 105 points just two days ago.
• Harden's matchup advantage is the sharpest edge on this slate. He averages 29.0 PPG against Dallas across three games this season with Thompson nominally in the rotation. With Thompson out entirely, that number should climb further. His 14.1 drives per game attack a perimeter defense that has no one left to slow them.
• Mobley's rebounding situation enters elite territory with Gafford out. His 8.7 RPG season average against regular frontcourts rises when the opposing center is missing entirely. Flagg at 6.6 RPG is the only interior rebounder Dallas can put on the floor, and that is a significant size and experience mismatch.
• Cleveland's home offense is genuinely elite: 22-12 at home this season, 117.9 PPG in those games, ORTG of 117.7 ranking fourth in the league. They scored 138 in the last meeting with a healthier Dallas roster on the floor.
• The blowout scenario introduces real total risk. If Cleveland leads by 25-plus in the fourth quarter, both teams will shorten rotations and reduce live possessions. Our model projects 235.9 combined points, clearing 234.5 by only 1.4 points. The edge is real, but thin, and live monitoring matters.
• Flagg's scoring ceiling is structurally limited by Dallas's depleted spacing. His 28.2% catch-and-shoot rate lets Cleveland crowd his drives without paying on the perimeter. In a projected double-digit blowout, Cleveland will switch to conservative schemes in the fourth, further diluting his counting stats down the stretch.

The primary play is Cleveland -7.0. The model's 17-point projection makes this line look like a gift. The best single-player value is Harden Over 24.5 at +164, where you are getting plus-money on a player who averages 29 against this opponent. Those two plays are the core. If you want a correlated ticket, the same-game parlay combining Cleveland -7.0, Harden Over 24.5, and Mobley Over 9.5 rebounds ties three outcomes that are all driven by the same blowout result. For first-basket value, Mobley at +370 makes sense given Cleveland's paint-first early possession tendencies in half-court sets.

The one angle worth watching carefully is the total. Over 234.5 at +110 is directionally correct given our projection, but that 1.4-point cushion above the line is razor thin. Any extended garbage time in the fourth quarter turns a push into a miss. The spread and the Harden prop carry no such blowout vulnerability, since a bigger Cleveland win only helps them clear. Hold those plays through the final whistle. On the total, stay close to the live line and be ready to hedge if Cleveland runs away early.