The implied winning probability for the "Over" position in Polymarket's Los Angeles Angels vs. Miami Marlins "O/U 9.5" market dropped sharply within an hour, sliding from 43.5% to 13.5%, according to Catcher Predict monitoring. The 30-percentage-point move underscores how prediction markets can rapidly reprice event odds when traders respond to related breaking developments. On sports-linked outcome markets, total-runs contracts such as over/under lines reflect changing expectations for scoring, and abrupt swings often signal that participants are reacting to new information.