Despite standing on the threshhold of making it to their first World Series, the Mariners suffered a crushing defeat. No additional specifics about when and where the game occurred or the opposition were provided in the headline. The reasons for the loss aren't indicated, nor what ramifications it might have on the Mariners' steps forward.
Baseball is a highly popular sport in Japan, with a following that is passionate and knowledgeable about the game. Sporting achievements, particularly on a global platform like the World Series, are a matter of national pride. Hence, the Mariners standing on the edge of their first World Series is likely a topic of wide interest and their loss a subject of national disappointment.
Similarly in the US, baseball is a major sport and any significant achievement or failure by a team is a matter of national interest. Sports journalism in both countries would likely cover such news with intense depth, discussing factors contributing to the defeat and speculating on the team's next steps.