Robert Williams hasn't gotten off to a good start with the Boston Celtics, and it now looks to have gotten worse. In his first Summer League game, he left after playing 6:45 minutes with a left knee contusion.

He banged knees with a Philadelphia 76ers player and left the game immediately. He did return to the bench in the second half but had an ice pack on his knee, and did not return to the game.

Article Continues Below
More NBA News
Boston Celtics center Kristaps Porzingis (8) shoots a free throw against the New York Knicks in the second half during game two of the second round for the 2025 NBA Playoffs at TD Garden.
Hawks rumors: 1 big move Atlanta is targeting after Kristaps Porzingis tradeRishav Bhat ·
Jazz forward John Collins (20) drives against Oklahoma City Thunder guard Cason Wallace (22) during the second half at Paycom Center
NBA rumors: Jazz’s John Collins trade outlook amid Lakers buzzMalik Brown ·
image thumbnail
Sources: Nets eyeing draft-day trade with 76ers, Hornets amid Ace Bailey buzzErik Slater ·
image thumbnail
San Antonio Spurs’ perfect outcome for No. 14 pick in 2025 NBA DraftHector Ledesma ·
Koby Brea, Kentucky Wildcats, 2025 NBA Draft
Koby Brea stakes claim as best shooter in the NBA Draft, eyes all-around improvementTomer Azarly ·
Pistons guard Dennis Schroder vs Kings forward DeMar DeRozan
Kings rumors: Dennis Schroder emerges as key Sacramento PG free agency targetJedd Pagaduan ·

After a nice career with the Texas A&M Aggies, Williams slipped on draft night all the way until late in the first round. His time with the Celtics got off to a rocky start and had to make some inside the organization scratch their heads. First, he overslept his first media press conference call, which was blamed on a miscommunication. Williams then missed his flight and missed the team's first summer league practice. Williams took all the blame for missing the plane and said it was a real wakeup call.

“It’s all on me,” Williams told reporters Tuesday, a day after he missed practice via NBC Sports. “So we’re going to push forward and move past that.”

“Missing my flight didn’t help,” he said. “I talked to Coach (Brad) Stevens when I got back and he obviously explained to me about the opportunity. There’s not that many. So, definitely a real wakeup call.”

It doesn't sound like Williams will be disciplined by the team, but hopefully, these are all wakeup calls for him, and the knee injury isn't serious so he can get back on the court soon.