How Does LeBron Signing With 76ers Affect NBA Title Odds?

Even in his 40s, LeBron James is a big enough star to completely shift the markets when he signs to a new team. After weeks of speculation, James has finally made his decision to head to Philadelphia. This came as quite a surprise, as the Heat and Cavs were heavily favored to land LeBron.

The odds for the 2027 NBA championship have been out since the conclusion of the 2026 season, but there has been a significant swing since the blockbuster signing.

On Polymarket, the 76ers have shot up to the 3rd-best odds to win the title in the upcoming season. Let's break down the other top contenders, and see how the odds have changed since the breaking news came out.

The Thunder fell short of reaching the NBA Finals in 2026, but remain the favorite to win it all in 2027.

Oklahoma City remains a title favorite because its roster is loaded with young talent that already has plenty of playoff experience. Back-to-back MVP Shai Gilgeous-Alexander leads a core that won 64 games and reached the Western Conference Finals last season. Trading Lu Dort creates larger roles for Cason Wallace, Jared McCain and other young players who may be ready to break out. It is sort of addition by subtraction, since there were simply too many guards needing minutes last season. The Thunder also drafted 7-foot-3 center Aday Mara, giving them another interior option who can take some of the physical burden off Chet Holmgren. We saw Chet get bullied in the Playoffs, and the Thunder acted quickly to add depth at his position.

Right there with the Thunder in the odds are last season’s runners-up. The Spurs fell short in the NBA Finals, but enter 2027 with much higher expectations than they faced a year ago.

Victor Wembanyama is already one of the best players in the NBA and may still be years away from reaching his prime as he enters his fourth season. San Antonio’s young core should continue improving around him, with Stephon Castle entering Year 3 and Dylan Harper entering Year 2. The experience of making a deep playoff run should also help the Spurs learn from the mistakes that cost them in the Finals. After coming that close, they should enter the season with even more motivation to finish the job.

The 76ers are obviously the biggest risers in the title odds after making multiple team-defining moves this offseason. Philadelphia entered the summer with just a 1% chance to win the championship, jumped to 7% after adding Jaylen Brown and then climbed to 14% following the LeBron James signing.

Adding LeBron and Brown gives Philadelphia what may be the strongest starting lineup in the NBA. More importantly, their arrival takes some of the weight off Joel Embiid’s shoulders. The Sixers no longer need Embiid to dominate every night, with LeBron, Brown and Tyrese Maxey all capable of carrying the offense. The talent is certainly there to win a championship. As usual with Philadelphia, the biggest question is whether its stars can stay healthy long enough to make a complete playoff run.

Giving the defending champions only a 9% chance to repeat feels a bit disrespectful. The Knicks are running it back with essentially the same roster that just proved it can win a championship.

New York may not have the overwhelming star power of some other contenders, but it has a well-rounded roster with strong chemistry and camaraderie. Getting the job done last season should also give the Knicks confidence when they face difficult moments in the playoffs. The biggest difference is that no one will underestimate them this time. New York enters the season with a target on its back, and every opponent will be looking to make a statement against the defending champions.

The Celtics are barely edging out the Heat, Cavaliers and Raptors with a 5% chance to win the championship. That is a major drop for a team that entered the previous few seasons among the clear favorites.

Boston made one of the offseason’s biggest moves by trading Jaylen Brown for Paul George. George is a downgrade at this stage of his career, but the Celtics should benefit from a healthier Jayson Tatum after he spent last season working his way back into form. The addition of Mitchell Robinson also gives Boston more size and rebounding around a core that still has plenty of playoff experience. The Celtics may no longer be the team to beat, but there is enough talent left to keep them in the title conversation.