BOSTON, MASSACHUSETTS - APRIL 28: Jaylen Brown #7 of the Boston Celtics drives to the basket against Paul George #8 of the Philadelphia 76ers during the fourth quarter in Game Five of the First Round of the NBA Eastern Conference Playoff at TD Garden on April 28, 2026 in Boston, Massachusetts. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Maddie Meyer/Getty Images)Getty ImagesWhat a difference a few weeks make in the NBA.Two weeks ago, Giannis Antetokounmpo was a Milwaukee Buck, Kawhi Leonard was a Los Angeles Clipper and Jaylen Brown was a Boston Celtic. Now, Antetokounmpo is on the Miami Heat, Leonard is back on the Toronto Raptors and Brown is on the Philadelphia 76ers.The Celtics dangled Brown in trade talks for Antetokounmpo, but when Milwaukee chose Miami's offer, Boston had to pivot. Rather than try to smooth things over with the 2024 Finals MVP, the Celtics continued to "actively engage" in trade talks involving him, per ESPN's Shams Charania.At first, Charania reported that the Celtics were asking for as many as four first-round picks for Brown. They wound up settling for an unprotected 2031 first-round pick, a first-round pick or a swap in 2028, two second-round picks and Paul George, according to multiple reports.That trade instantly shook up the Eastern Conference hierarchy.The odds have only continued to swing in Philly's favor—and away from Boston. As of midnight ET on July 2, the Celtics were +1300 to win the 2026-27 championship—trailing only the San Antonio Spurs (+230), Oklahoma City Thunder (+250) and reigning champion New York Knicks (+850)—while the Sixers weren't far behind at +2000, per FanDuel Sportsbook.MORE FOR YOUAs of midday Wednesday, the Sixers appeared headed for another first- or second-round playoff exit at best. Twelve hours later, they suddenly have legitimate Finals aspirations again.Can Brown Push The Sixers Over The Hump?Brown is fresh off a career year in which he finished sixth in the MVP race after averaging 28.7 points, 6.9 rebounds and 5.1 assists in only 34.4 minutes per game. George used to put up numbers like that in his prime, but the 36-year-old averaged only 17.3 points, 5.3 rebounds and 3.6 assists in 30.7 minutes per game this past season.Two years ago, Brown helped guide the Celtics to a championship while putting up 23.9 points, 5.9 rebounds and 3.3 assists per game in the playoffs. Since the Celtics drafted him with the No. 3 overall pick in 2016, they’ve made two trips to the NBA Finals and had six appearances in the Eastern Conference Finals. Brown wasn't solely responsible for the Celtics' success over the past decade. His former co-star, Jayson Tatum, emerged as an All-NBA forward as well, while the likes of Derrick White, Kristaps Porziņģis, Al Horford and Jrue Holiday were critical members of Boston's supporting cast around the two star wings.But the Celtics had the NBA's best record by far since they drafted Brown (530-270). The next-closest team, the Denver Nuggets, were only 495-306 over that same span. The Sixers were seventh at 444-357.In Philly, Brown will now team up with an All-NBA point guard in Tyrese Maxey, a rising young star in VJ Edgecombe and a former MVP in Joel Embiid. He's played with some incredible guards and centers throughout his 10-year career, but none quite like Maxey, Edgecombe and Embiid.However, Brown isn't necessarily a picture-perfect fit in Philadelphia. While he's far more dependable than George from a health perspective, he's also a much worse three-point shooter. The Sixers did sign Dean Wade, who's a career 36.7% three-point shooter, but their offensive spacing could still be tight whenever Brown, Embiid and Edgecombe all share the floor together. The Sixers now have plenty of high-end talent, but figuring out how to make those pieces fit together could be a challenge. Sixers head coach Nick Nurse has his work cut out for him next season.The New Eastern Conference HierarchyThe Brown-George swap wasn't the only splash that Boston made Wednesday. The Celtics also spent their entire mid-level exception to pry free-agent center Mitchell Robinson away from the Knicks.Center looked like a clear weak spot for the Celtics heading into last season, although they smoke-and-mirrored their way into covering that up thanks to a career year from Neemias Queta. But once the playoffs began, Embiid largely had his way with Queta, Luka Garza and Nikola Vučević during the Sixers' first-round series against Boston.Robinson will be a far tougher test for Embiid and the East’s other bigs. He’s a complete non-factor as a scorer unless he’s right around the basket, but he’s one of the league’s best rebounders on a per-minute basis and sets bone-crunching screens as well. He should routinely help free up Boston’s bevy of shooters.Even after trading Brown for George, the Celtics can put together a formidable starting five. Tatum, George and Derrick White are locks, Robinson will battle with Queta for the starting center gig, while the fifth spot might come down to Payton Pritchard and Sam Hauser. Pritchard won Sixth Man of the Year in 2024-25, although he started 50 games this past season as Tatum worked his way back from a torn Achilles. The Brown trade may be a hit to the Celtics' championship chances, but it's telling that they still have the second-best odds of any Eastern Conference team this coming season. Oddsmakers still clearly believe that Boston will be a factor in the title race.The Heat and Raptors' title odds have also soared in the wake of the Antetokounmpo and Leonard trades, while the Indiana Pacers could have sleeping-giant potential after the trade-deadline acquisition of Ivica Zubac. Star point guard Tyrese Haliburton missed the entire 2025-26 campaign to recover from a torn Achilles, but the Pacers were one game away from toppling the Oklahoma City Thunder and winning the 2024-25 championship before Haliburton got hurt.Although the Detroit Pistons landed John Collins, they lost Tobias Harris to the San Antonio Spurs and remain in a standoff with restricted free agent Jalen Duren. The Cleveland Cavaliers already lost Wade to the Sixers and Keon Ellis to the Brooklyn Nets, but they're still holding out hope for another reunion with LeBron James.Plenty can and will change throughout the East in the coming days and weeks as the rest of free agency unfolds, but the Sixers appear to have vaulted themselves back into the inner circle of championship contenders with the Brown trade on Wednesday. There are more questions than answers about the Celtics' side of this deal for now, but this past season should have taught everyone to underestimate them at your own peril.Besides, the last blockbuster Celtics-Sixers trade worked out far better for Boston than it did for Philly. Who’s to say history won’t repeat itself?Unless otherwise noted, all stats via NBA.com, PBPStats, Cleaning the Glass or Basketball Reference. All salary information via Spotrac and salary-cap information via RealGM. All odds via FanDuel Sportsbook.Follow Bryan on Bluesky.