Philadelphia's improbable pursuit of LeBron James paid off Friday, and betting markets responded almost instantly, catapulting the 76ers from afterthought status into the thick of the 2027 NBA championship conversation in a matter of hours.

James agreed to a two-year, $8 million contract with Philadelphia, joining a core that already includes Joel Embiid, Tyrese Maxey and newly acquired Jaylen Brown. The move triggered one of the sharpest single-day shifts in championship odds seen across major sportsbooks and prediction markets this offseason.

How dramatically the odds moved

At bet365, the Sixers jumped from 2700 to 1100 to win the title following the announcement. FanDuel Sportsbook placed Philadelphia at 1000, ranking the team as the fourth favorite behind the Oklahoma City Thunder ( 260), San Antonio Spurs ( 270) and New York Knicks ( 900). ESPN reported the Sixers moved to 900, tying them for third with the reigning champion Knicks, after starting the day at 20-1 and having already shortened from 60-1 following the Jaylen Brown trade earlier this month.

On the prediction market Kalshi, Philadelphia's implied championship probability roughly doubled from 6 cents to 12 cents, equivalent to 733 American odds, placing the Sixers third behind only Oklahoma City and San Antonio. Polymarket showed a similar jump, with Philadelphia's odds climbing to between 12% and 13%, also good for third place in that market. BetMGM's Halvor Egeland, the........

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