The injury occurred in the first quarter of Friday’s game against the Sixers when Jaylen Brown landed on Pritchard’s foot while chasing a rebound. Pritchard’s knee bent awkwardly and he had to be helped off the court.
The rookie out of Oregon has been a pleasant early-season surprise in Boston. He is averaging 7.7 points, 2.4 rebounds and 2.6 assists through 14 games and has moved ahead of veteran guard Jeff Teague in the rotation.
The Celtics’ backcourt will be short-handed while Pritchard is out of action, notes Matt Vautour of MassLive. Kemba Walker, who returned from left knee soreness last weekend, is on a minutes restriction, while Carsen Edwards and Aaron Nesmith are already out of action.