Miami vs New York M

This market covers the July 31 MLB game between the visiting Miami Marlins and the host New York Mets at Citi Field, with markets live across Kalshi and Polymarket spanning moneyline, totals, first-five-innings, spread, and an extensive slate of player props for both sides. The core moneyline question is straightforward: does Miami or New York win the game outright? The Miami Marlins are the current favourite at 61.0% on both Kalshi and Polymarket (60.0%), a tight 1.0-point cross-platform spread that signals strong consensus. The Mets sit at 40.0% on both platforms, leaving a roughly 21-point gap between the two sides. On the totals side, markets lean toward the over on the 2.5-run line at 86.0% on Kalshi, reflecting expectations of a fairly active offensive game, though the New York Mets winning by more than 3.5 runs is priced at just 7.0%. Miami enters at 55–55 on the season, while the Mets are 47–63 after winning game one of this series 4–2. Luis Robert Jr. had a two-run single to cap an eighth-inning rally in New York's victory Thursday night. Despite that loss, Miami retains the moneyline edge heading into the July 31 contest, driven partly by the pitching matchup: Janson Junk starts for Miami, carrying a 4-6 record and 4.89 ERA, while Freddy Peralta's status for the Mets was uncertain given the likelihood of a pre-deadline trade — a key piece of information that appears to weigh on New York's implied probability. Both platforms align closely, making this one of the tighter, more efficient cross-platform markets on the slate.