Chicago Cubs defeat Pittsburgh Pirates 4-3: Recap, Betting Results & AiQ Picks

Sat, Sep 12, 2026 · MLB · Pittsburgh Pirates 3, Chicago Cubs 4

Chicago Cubs defeated Pittsburgh Pirates 4–3 at Wrigley Field. Pittsburgh covered the +1.5 spread despite the loss, while the combined 7 runs fell short of the 9.5 total.

Pittsburgh Pirates vs. Chicago Cubs final score and game recap

The Cubs scored in the first and third innings to build a 2–0 lead through five frames. Pittsburgh struck for three runs in the sixth, taking a 3–2 advantage. Chicago answered with two runs in the eighth to reclaim and hold the lead for a 4–3 final.

Who covered the spread in Pittsburgh Pirates vs. Chicago Cubs?

Pittsburgh Pirates covered as +1.5 underdogs, winning the spread despite losing the game. The line opened at Chicago Cubs +1.5 and shifted 3 points toward Chicago, closing at –1.5. The Cubs won by exactly one run, leaving the underdog as the against-the-spread victor. AiQ's spread pick of Pittsburgh Pirates +1.5 at 57% confidence graded as a win.

Did Pittsburgh Pirates vs. Chicago Cubs go over or under the total?

The game finished under 9.5 with 7 combined runs. The Cubs scored 1 run in the first inning and 1 in the third, Pittsburgh added three in the sixth, and Chicago closed with two in the eighth. The total opened at 8.5 and moved up 1 to 9.5. AiQ's under pick at 58% confidence won.

How did AiQ's Pittsburgh Pirates vs. Chicago Cubs predictions do?

AiQ finished 2–1 across graded picks:

The model correctly identified the underdog covering and the low-scoring outcome but missed the Cubs' moneyline favorite status.

Pittsburgh Pirates vs. Chicago Cubs odds: sportsbook value and line movement

Moneyline odds closed at Pittsburgh Pirates +107 and Chicago Cubs –129, implying 46% win probability for Pittsburgh and 54% for Chicago after vigorish removal. The bookmaker margin was 4.6%. A $100 wager on Chicago at –129 returned $77.52 in profit. AiQ's pre-game expected value for the Pirates moneyline was –3.5% at +109, indicating negative expected value despite the model's belief in Pittsburgh's chances. The spread shifted toward Chicago, but the underdog covered anyway.

Pittsburgh sits at 74–74 overall with a 38–34 home record and 36–40 on the road. Against the spread, the Pirates are 49–69 in 118 games and 58–54–6 on the over/under in the same sample. They have lost two straight after winning three straight before that. Chicago stands at 80–66 overall, 41–31 at home and 39–35 away. The Cubs are 60–55 against the spread in 115 games and 61–53–1 on the over/under. They have won two straight following a three-game losing streak.

What's next for Pittsburgh Pirates and Chicago Cubs?

Pittsburgh hosts Milwaukee Brewers on Thursday, September 17. Chicago travels to Cincinnati to face the Reds on Friday, September 18.