Polymarket MLB markets show thin liquidity with unexplained probability spikes
Polymarket MLB event markets are showing thin liquidity and sharp probability swings without clear catalysts. The Milwaukee Brewers' win probability jumped significantly in the Giants vs. Brewers market as of June 2, though no exact probability figure, trade volume, or reason for the move was cited. Separately, the Seattle Mariners' win probability surged in the Mets vs. Mariners market by June 3, again without specified odds or dollar volume. A Miami Marlins vs. New York Mets market dated May 31 carried just $3,500 in liquidity, underscoring the shallow depth across these baseball contracts. None of the moves were tied to injury news, lineup changes, or external market events.
Traders cannot size positions confidently when $3.5K liquidity pools produce unexplained probability jumps without volume transparency. Polymarket's sports vertical risks automated flow pulling back until basic market microstructure data is disclosed.