While the web search results discuss losing streaks, none of the provided evidence explicitly confirm that the Mets lost *at least eight runs* in *two consecutive games*. The evidence for the 9-game streak is present, but the specific detail of 'at least eight runs in two consecutive games' is not corroborated by multiple sources.

The claim that Senga allowed seven runs (six earned) on six hits and three walks over 3 1/3 innings is detailed in the claim's narrative and is referenced in the context of the 12-4 loss. However, the provided evidence for this specific pitching line (7 runs, 6 earned, 6 hits, 3 walks, 3 1/3 innings) is not found in multiple independent sources, only implied by the context of the loss.

Two web search results mention the Mets scoring three runs in the second inning, but both instances relate to different games (one against the Giants, one in the context of the Cubs game). Since the claim specifies the context of the 12-4 loss to the Cubs, and the evidence for that specific event is not corroborated, it is marked as single-source based on the available context.