Prediction market companies are moving into sports sponsorship at a speed that looks familiar to anyone who watched the first sportsbook marketing boom. Industry tracking firm SponsorUnited said Polymarket and Kalshi are following the old betting playbook, chasing league deals, team ties, and fan-facing visibility across U.S. sports.
That is starting to bother the incumbents. Gambling Insider reported that sportsbook brands have begun talking to partners about broader rights packages as prediction markets pick off assets that once would have sat naturally with a betting operator.
Polymarket has been the busiest mover
Polymarket’s push is no longer theoretical. MLS named it an official and exclusive prediction market partner in January. MLB followed in March, making Polymarket its official prediction market exchange partner. On April 2, LaLiga North America announced a similar official and exclusive deal for the U.S. and Canada.
The company had already gone into combat sports before that. TKO and UFC announced in November that Polymarket would become the official and exclusive prediction market partner of UFC and Zuffa Boxing.
Kalshi has also found room in the same market
Kalshi has not matched Polymarket’s recent league run, but it got in early with the NHL. The league announced in October that both Kalshi and Polymarket would become official prediction market partners, with access to NHL marks, logos, and proprietary data.
SponsorUnited said Kalshi has also tied itself to the Chicago Blackhawks, the Pro Padel League, and a wider mix of influencer deals. The broader point is that rights holders are not waiting for every legal question around prediction markets to settle before selling access.
Sportsbooks are trying to stop the space from getting away from them
Prediction markets still sit in a messier legal position than sportsbooks, but sponsorship buyers do not always wait for legal clarity. They buy attention, reach, and category momentum, and prediction markets now have all three.
That is why this fight is getting sharper. Sportsbooks are not just protecting brand space. They are trying to stop a new category from turning sponsorship into another front in the betting market war.
