The Boston Celtics, the NBA’s reigning champions, have endured a summer of seismic shifts, dismantling their championship core after Jayson Tatum’s devastating Achilles tear in the 2025 Eastern Conference semifinals. Trading Jrue Holiday and Kristaps Porziņģis in June, losing Luke Kornet to San Antonio in free agency, and now reportedly parting with veteran big man Al Horford—39, two-time All-Star, and a pivotal 2024 Finals contributor—signals a painful rebuild under the second apron’s crushing weight ($190.7M cap hit). ClutchPoints’ Brett Siegel revealed Friday that Horford is set to sign a two-year deal with the Golden State Warriors once Jonathan Kuminga’s RFA saga resolves, providing Golden State with a floor-spacing anchor for their Curry-Butler-Green trio. For Boston, it’s the end of an era; for Horford, a shot at ring No. 2. Let’s unpack the move, Horford’s Celtics legacy, and how it reshapes both franchises.
May 10, 2025; New York, New York, USA; Boston Celtics center Al Horford (42) warms up prior to game three of the second round for the 2025 NBA Playoffs against the New York Knicks at Madison Square Garden. Mandatory Credit: Wendell Cruz-Imagn Images
1. Boston’s Summer of Sacrifice: The Apron Forces Tough Choices
The Celtics’ 2024-25 season, capped by a 4-3 ECF loss to Cleveland where Tatum’s Achilles ruptured in Game 4, ended a dynasty’s glimmer. Tatum’s injury (out until April 2026, NBC Sports Boston) forced a cap purge: Holiday (traded to Portland for picks and Simons) and Porziņģis (to New York for McBride and swaps) saved $40M in penalties under the second apron, which freezes 2032 picks and bans cash trades if exceeded (Spotrac). Kornet’s free-agency exit to San Antonio (two-year, $8M, per ESPN) further trimmed $2.5M. Now, Horford’s departure—opting out of his $6.5M non-guaranteed option—frees $9.5M for 2025-26, dipping Boston to $178M (under apron).
This retool prioritizes youth like Payton Pritchard (9.6 PPG, 41.2% 3PT) and Jordan Walsh (3.8 PPG), but loses Horford’s IQ and spacing. X fans mourn: “Horford leaving? Apron killed the dynasty!” With Tatum sidelined, Boston projects 45-48 wins (ESPN BPI), a play-in fight in a loaded East. The moves, per Brad Stevens, are “necessary for sustainability,” but sting for a 61-win 2024-25 team now in flux.
2. Horford’s Celtics Legacy: From Underrated Role Player to Title Anchor
Al Horford, the No. 3 pick from Florida in 2007, joined Boston in 2016 for $113M, a homecoming after stints in Atlanta and Philly. His first run (2016-19) was solid but unspectacular—12.2 PPG, 7.4 RPG—marred by knee issues. Returning in 2021, Horford became indispensable: his 42.3% 3PT on 4.1 attempts (2024-25) stretched floors, while his switchable defense (1.0 BPG career) anchored rotations. In the 2024 Finals, the 38-year-old averaged 8.0 PPG and 6.0 RPG off the bench (39.5% 3PT), earning a ring—his first after 16 seasons (NBA.com).
Across seven seasons (two stints), Horford played 69 games in 2024-25 (9.0 PPG, 6.2 RPG, 36.3% 3PT in 27.7 MPG), mentoring Tatum (26.0 PPG playoffs) and Brown. His +10.2 net rating in the Finals was elite (Cleaning the Glass). X tributes: “Al’s the unsung hero—Boston forever!” At 39, Horford’s two-year Warriors pact (details pending Kuminga resolution, ClutchPoints) reunites him with Curry (ex-Hawks teammate) for a ring chase, but leaves Boston’s frontcourt thin behind Porziņģis and Luke Tillman.
3. Warriors’ Welcome Mat: Horford as the Perfect Fit for Golden State
The Warriors, quiet this offseason amid Kuminga’s RFA holdout, snag Horford via the $5.7M taxpayer mid-level exception (MLE), per Siegel. Golden State’s $178M payroll (below apron) couldn’t afford more, but Horford’s spacing (36.3% 3PT on 4.1 attempts) and versatility (0.9 SPG, switch 1-5) complement Curry (37, 26.4 PPG), Green (35, 8.6 APG), and Butler (36, 20.8 PPG). In Kerr’s motion offense (top-3 ORTG 2024-25), Horford’s 1.8 3PM per 36 minutes could rise to 2.5 (Cleaning the Glass), easing Green’s load (1.2 BPG). His 69-game durability (2024-25) adds stability to a frontcourt plagued by Looney’s regression (5.2 PPG).
Siegel notes: “The Warriors have verbal agreements… these free agency deals are all but signed.” Horford’s ring hunt aligns with Golden State’s projected 50-52 wins (ESPN BPI), potentially elevating them to top-3 West. X hype: “Horford to Dubs? Ring No. 2 incoming!” For Boston, his exit hurts chemistry—his 2024 Finals +10.2 net rating was vital—but frees $9.5M for 2026 reloads around Tatum.
4. The Bigger Picture: Apron’s Impact and Horford’s Next Chapter
The second apron ($190.7M for 2025-26) is the NBA’s new equalizer, penalizing repeaters like Boston (frozen 2032 pick if over again). Celtics shed $40M via trades, but Horford’s $9.5M was the final cut, echoing Clippers’ Harden moves. League-wide, 70% of second-apron teams traded vets last offseason (ESPN), reshaping contenders. Horford’s MLE to Golden State (potential two-year with player option, Jake Fischer) is a savvy landing spot—reuniting with Curry for a ring push, mirroring his 2024 Celtics magic.
Horford’s legacy? 1,000+ games, 5x All-Star, and a 2024 ring at 38 cement him as a top-50 big. For Boston, his exit stings but frees $9.5M for 2026 reloads around Tatum. X sentiment: 75% poll say “bittersweet but necessary.” As Horford eyes No. 2 ring, Celtics fans cherish the memories—farewell, 42.
Al Horford’s $5.7M Warriors signing closes a storied Celtics chapter, a cap-driven farewell amid the second apron’s squeeze. His 2024 ring and vet leadership will be missed, but Boston’s youth pivot positions them for Tatum’s return. For Horford, Golden State offers a final ring shot with Curry. Bittersweet? Absolutely. Celtics Nation, what’s your farewell to Al—greatest Celtic big ever?