Cubs blown out by Pirates, lose 10th straight after two 10-game win streaks.

The Chicago Cubs are experiencing a significant downturn.

Their struggles reached an unprecedented level on Tuesday in Pittsburgh, as their poor performance in May persisted with a decisive 12-1 loss against the Pirates. The Cubs, who boasted a 27-12 record by May 8 following their second 10-game victory run of the 2026 season, currently stand at 29-26, having endured a 10-game losing streak and 14 defeats in their most recent 16 matchups.

They are consistently ceding position in a competitive NL Central division, notably the sole MLB division where every team maintains a winning record.

Chicago’s batting lineup has been unproductive throughout this period without victories. The Cubs have faced considerable difficulty converting opportunities with players in scoring positions, a problem that resurfaced on Tuesday at PNC Park. Despite accumulating eight hits, their singular point was scored in the second inning. With runners positioned on first and second bases and no outs in the ninth, they again failed to score, concluding the overwhelming defeat meekly.

Chicago’s current 10-game losing streak represents their most extended period of consecutive losses since a similar downturn from June 4-16, 2022. This season’s unproductive phase began prior to June, as did the team’s pair of 10-game winning streaks.

Have any other MLB clubs previously encountered such extreme fluctuations in performance?

Yes. In 2017, the Los Angeles Dodgers achieved 10 consecutive victories in June and 11 in July, only to suffer 11 consecutive defeats in September. Notably, the Dodgers advanced to the World Series that year, ultimately falling in a seven-game series to the Houston Astros.