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NFL Week 4 opens Thursday night, and early trading activity on Polymarket already tells a story. Four contracts have moved with conviction over the past few weeks, from a complete reversal in an AFC North rivalry to a season-ending injury reshaping an AFC East backfield. Whether you're already trading or just getting familiar with how these markets work, our full Polymarket review breaks down the platform in more detail. And don't forget, you can download the Action Network app for more picks and analysis ahead of Thursday's kickoff.
NFL Week 4 on Polymarket
Prediction markets function like a running vote expressed through prices instead of ballots. Traders buy contracts tied to how they expect a game, award, or other real-world event to play out, and prices shift with demand — the more money that flows toward one side, the higher that side's price climbs. Checking a market's chart is a quick way to see not just where the crowd stands, but how fast that view has been changing.
Each NFL matchup usually comes with more than one contract to watch, too. Beyond who wins the game, markets often cover the point spread, total score, and individual player performances, giving traders several angles to work with on the same matchup.
Steelers vs. Browns: A Full Reversal Before Kickoff
Thursday, October 1, 8:15 PM ET
Pittsburgh is holding a clear edge, though both teams sit at 2-1 through three games.
Packers vs. Buccaneers: Tampa Bay Loses Ground Fast
Sunday, October 4, 1:00 PM ET
This NFC matchup traded close to even for weeks, with neither side pulling away. That changed quickly over the past several days, with Green Bay opening a real gap over Tampa Bay. The timing lines up with news out of the Buccaneers' camp: quarterback Baker Mayfield dislocated his thumb in Week 3, and head coach Todd Bowles confirmed Monday that the injury will keep Mayfield sidelined for a few weeks. Paired with an 0-3 start to the season, that's a tough combination for Tampa Bay's outlook.
Dolphins vs. Vikings: Miami's Backfield Takes a Hit
Sunday, October 4, 4:05 PM ET
Minnesota already held a sizable advantage in this one, and the gap has only widened. Miami's top offensive weapon, running back De'Von Achane, is done for the season after tearing his ACL. That's a serious blow for a Dolphins offense that was already struggling. It helps explain why this remains the most one-sided contract among this week's early movers, and why it's worth checking again before Sunday's afternoon window.
Colts vs. Commanders: London Game Swings Late
Sunday, October 4, 9:30 AM ET
This London matchup carries the heaviest trading volume of the four — north of $180,000 — and its most recent move has been sharp. Commanders quarterback Jayden Daniels, working back from a dislocated elbow, is expected to return to practice this week and travel with the team to England. Even with that positive update, Indianapolis has pulled well ahead of Washington over the past several days, a sign traders are not convinced the Commanders' offense is back to full strength yet. With so much volume already behind it, this contract will be intriguing to track all the way through Sunday's early kickoff.
