The Boston Celtics continue to build out their asset base of young talent with the 2025 Summer League now looming.
Sources inform Keith Smith of Spotrac that Boston will add 6-foot-10 former Gonzaga Bulldogs power forward/center Ben Gregg, an undrafted free agent, to its roster for Summer League festivities.
The Boston Celtics are adding Ben Gregg to the Summer League roster. Gregg is a 6-foot-10 forward/center out of Gonzaga.
— Keith Smith (@KeithSmithNBA) June 27, 2025
A fifth-year senior last season, Gregg averaged 9.1 points on 57. Percent field goal shooting and 79.1 percent free throw shooting, 4.9 rebounds, 1.3 assists and 0.7 steals a night.
Although no Gonzaga players were conscripted through the draft this week, Gregg's former point guard Ryan Nembhard was also quickly picked up on a two-way deal by the Dallas Mavericks.
Boston grabbed three young prospects in the 2025 NBA Draft on Wednesday and Thursday.
The Celtics used their No. 28 pick on wing Hugo Gonzalez of Real Madrid. Boston traded down from the No. 32 pick in the second round with the Orlando Magic, and subsequently added Kentucky center Amari Williams with the No. 46 selection and VCU guard Max Shulga with the No. 57 pick.
Now, that trio will be joined by Gregg in Las Vegas next month.
Last season, the Celtics continued the unfortunate trend of defending champs who could not survive the second round of the playoffs. No team since the 2019 Golden State Warriors has returned to the NBA Finals, and no team since the 2018 Warriors has successfully won back-to-back championships.
Boston, like many of its predecessors, suffered through wear-and-tear-related injuries, excess mileage, age-related decline and persistent viral illnesses during the 2025 playoffs.
The Celtics fell in six games to the New York Knicks in the second round, losing six-time All-Star Jayson Tatum late in Game 4 to an Achilles tear that could cost him all of 2025-26.
Boston subsequently traded All-Defensive guard Jrue Holiday and starting center Kristaps Porzingis ahead of the draft to dip under the NBA's punitive luxury tax.
MORE NEWS: Celtics make yet another trade ahead of 2025 free agency