OPTIMUS II does not read this as a conventional starter-versus-starter game. Sean Newcomb is scheduled to open for the White Sox and Clay Holmes starts for the Cubs — both with tidy headline ERAs — but the structure behind those numbers is what drives this market.

A bullpen game by design

Chicago used Erick Fedde for 4⅔ scoreless in Tuesday’s rain-delayed game after Bryan Hudson opened, then needed Brazobán, Taylor and Richards in a 4–3 walk-off loss. Newcomb was warming late in that game and now opens the finale — another bullpen-heavy script, and less flexibility for the White Sox to pick their cleanest bulk-relief sequence.

Both offenses can score

The Cubs have the depth to exploit that structure, and the White Sox carry enough contact quality that the Over doesn’t hinge on the Cubs alone — the model gives each lineup a real path to four-ish runs rather than needing an extreme performance.

Two productive lineups — Holmes had also allowed a 43.7% hard-hit rate, giving the White Sox a realistic route to three or four of their own.

How the model sees it

Across 100,000 simulations, OPTIMUS II projected roughly 8.7 total runs and a 56.9% chance of at least eight — with a central score around Cubs 5, White Sox 4.

Key statistics

• Model: 56.9% probability of at least eight runs; fair odds 1.76; risk-adjusted EV +2.8% (valid at 1.79+).
• Projected ~8.7 total runs across 100,000 simulations; central score Cubs 5–4 White Sox.
• Newcomb opens for the White Sox (2.51 ERA); Holmes starts for the Cubs (2.56 ERA) — but a bullpen-heavy script.
• Cubs offense: .333 wOBA, .321 xwOBA, .419 SLG, 164 HR.
• White Sox: .320 wOBA, .318 xwOBA, 8.5% barrel, 40.1% hard-hit; Holmes allowing a 43.7% hard-hit rate.
• White Sox bullpen taxed after Tuesday’s rain-delayed walk-off loss.

Risks