Three Veteran Free Agents the Celtics Should Target in 2026
The Boston Celtics are entering one of the most complicated offseasons in the NBA. With Jayson Tatum and Jaylen Brown locked into massive contracts and second apron restrictions limiting roster flexibility, Boston must be extremely strategic this summer. The Celtics can no longer rely on major free agency spending or blockbuster additions to improve the roster. Instead, Brad Stevens needs to find veteran contributors willing to take smaller deals for a chance to compete for a championship. After Boston’s disappointing playoff collapse against the Philadelphia 76ers, improving the supporting cast has become a major priority.
Mitchell Robinson
Boston’s biggest roster weakness heading into next season could be frontcourt depth and interior toughness. Mitchell Robinson would immediately help solve that issue with his elite rebounding and rim protection. The Celtics need another reliable big man who can rebound, protect the rim, and handle the physicality of Eastern Conference matchups. Robinson feels like the type of affordable frontcourt addition connected to discussions surrounding offseason moves that could help the Celtics in 2026. The athletic center averaged strong rebounding numbers while consistently providing second chance opportunities on the offensive glass. His ability to protect the rim would give Boston another physical interior presence against larger Eastern Conference teams. If the Celtics want to become tougher in the paint, Robinson could be one of their most impactful veteran additions.
Collin Gillespie
Boston could also benefit from adding more reliable guard depth behind its current rotation. Collin Gillespie has quietly developed into a dependable floor general who can provide smart decision making and steady ball handling. The veteran guard would give Boston another guard capable of running the offense when the second unit needs structure. His shooting ability also fits well alongside Boston’s star wings. For a team that values low mistake basketball, Gillespie could become a very affordable option.
Robert Williams III
A reunion with Robert Williams III would immediately create excitement across Boston. The former Celtics big man remains one of the best rim protectors when healthy and already understands the organization’s defensive culture. His athleticism, shot blocking, and lob finishing would bring energy back to Boston’s frontcourt rotation. Health concerns remain a major factor, but the upside on a smaller contract could be worth the gamble. Bringing the defensive anchor back would also provide familiarity for a team trying to maximize its championship window.
Final Outlook
The Celtics do not need major roster changes to remain contenders, but they do need smarter depth additions. Boston’s biggest challenge is finding affordable players who can fill specific weaknesses without creating larger financial problems. Robinson would add size, Gillespie would stabilize the backcourt, and Williams would bring familiarity and defensive energy. All three players could realistically help Boston improve without requiring major spending. For a team trying to stay competitive under strict financial restrictions, moves like these may be exactly what keeps their championship window alive.
