Boston Traded Away Its Safety Net. Now Jayson Tatum Is the Whole Season

On May 2, the Celtics learned roughly two hours before tipoff that Jayson Tatum would not play Game 7 against Philadelphia. Four quarters later their season was over — a 109-100 loss to the 76ers, and the first blown 3-1 series lead in franchise history, the 14th such collapse in NBA history.

Four months later, essentially everything around Tatum has changed. And the player who was missing for the most important game of last season is now the entirety of the plan.

The offseason stripped the roster around him

Boston traded Jaylen Brown to the Philadelphia 76ers, and by the 76ers' own general manager's account, that move helped steer LeBron James to Philly. Brown leaves behind a career year: 28.7 points, 6.9 rebounds and 5.1 assists across 71 games on 47.7% shooting. Replacing that isn't a tweak — Celtics coverage spent August describing it as "familiar territory" for a franchise that has done this before and knows how rarely it goes smoothly.

What's left is Tatum, Derrick White (whose track record the beat writers keep pointing to), Payton Pritchard (still the subject of a live starter-or-sixth-man debate), and a supporting cast with genuine holes. This week's roster news fit the theme: Boston signed former lottery pick Devin Carter to an Exhibit 10 deal, one of four players competing for a two-way spot. That's the margin level the Celtics are operating at now.

What Tatum actually showed after the Achilles rupture

The encouraging part is real. Tatum returned last season from the Achilles tear he suffered in the 2025 playoffs and appeared in 16 games, averaging 21.8 points, 10.0 rebounds and 5.3 assists in 32.6 minutes. Over his final 10 games he was at 23.3 points, 10.6 rebounds and 6.9 assists on 46.2% shooting with a plus/minus of +6.7. He also organized voluntary workouts in Los Angeles in September — a quiet leadership shift that matters on a roster this young.

The concern is load. Boston won 56 games with a +7.7 point differential last season while Tatum missed most of it. Asking him to be both the No. 1 option and the connective tissue for a reshaped group is exactly the "no margin for error" framing that followed the Brown trade.

The East didn't wait around

The conference got deeper, and Boston's schedule includes a brutal November and an uptick in back-to-backs. BetMGM has the Celtics' win total at 51.5 and their championship odds at +1400. Tatum is +2000 for MVP and +3000 for Comeback Player of the Year — roughly 4.8% and 3.2% implied probabilities. Those aren't odds that scream decline, but they're also not the numbers of a team anyone is calling a lock.

One genuine windfall

The NBA fined the Clippers $30 million, stripped them of five first-round picks and suspended Steve Ballmer for a year over cap circumvention. Boston holds the Clippers' 2028 first-rounder, which was not among the forfeited selections — meaning a weakened LA roster could make that asset more valuable down the line. There's a caveat: reporting on Sept. 14 noted precedent that could allow the Clippers to recoup picks, so the windfall isn't guaranteed.

The bottom line

Boston opens the season Oct. 20 at Detroit with a roster built around one superstar, one rebuilt Achilles and a thinner margin than any Celtics team in years. The 2026-27 Celtics will go exactly as far as Tatum's health and availability allow — and last May, that wasn't far at all.