Orioles vs Red Sox: match prediction on 4 September 2026

Orioles win — 70%. The gap in recent form is the deciding factor: Baltimore have won four of their last five games while Boston have lost three of five, and the model expects the home side to outscore their visitors 5.4 to 4.1.

Form gap

Their most recent defeat came against the Rockies on 2 September, a 2-4 loss away, but they bounced back with a 2-1 win over the same side the following day. Before that they swept three straight against the Athletics, winning 8-5, 5-3 and 4-3 on 30 and 29 August. Baltimore have scored at least four runs in four of their last five games, while Boston have failed to score in two of their last five.

Their last outing before this fixture was a 6-9 home defeat to the Mariners on 1 September. The inconsistency in their defence has been a recurring problem, particularly against quality opposition.

Model expectations

The simulation puts Orioles at 5.4 expected runs and Red Sox at 4.1. It assigns a 0% probability to a draw and 0% to both teams scoring. Three or more runs together are also rated at 0%. These figures suggest a one-sided affair where Baltimore's attack outpaces Boston's defence without the visitors finding their own net.

Conditions that break the prediction

This conclusion stops holding if Boston find a way to contain the Orioles' run-scoring ability. A Red Sox victory would also require them to improve on their recent defensive record, particularly against teams that have exploited their vulnerabilities. The away form of both sides shows volatility, but the Orioles have shown more resilience in closing out games.