Texas Rangers vs. Colorado Rockies

Platform comparison

Active sub-markets

Market context

The Texas Rangers were due to play the Colorado Rockies at Coors Field on 19 May, with the market tied to the final official result. A 100% YES price is hard to reconcile with the actual setup: Texas arrived at 22-25 and Colorado at 19-29, but the Rockies had already taken the opener of the series 7-6, which shows how thin the margin is in Denver. For a comparable frame, team record alone is a poor guide at Coors Field, where run environment and bullpen exposure can quickly outweigh a paper advantage.

The main swing factors are the starting line-ups, late injury or rest news, and any pitching change before first pitch. MLB’s preview notes pointed to MacKenzie Gore and José Quintana as recent reference points in the series, while ESPN’s live and highlight pages indicate the games moved on schedule through 19-20 May. Recent coverage also suggested the Rangers’ bullpen held an edge if the game became a late contest, but that only matters if the offence does enough early damage; in the Rockies’ case, home power and whether Mickey Moniak and other regulars are available remain relevant. Any confirmed scratch, weather delay, or pitcher swap would be the most important catalyst for reassessing the price.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Texas Rangers vs. Colorado Rockies on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.