Beal, who suffered the injury in Thursday's loss at the Detroit Pistons, saw his consecutive games streak end at 194. He last missed a game on April 12, 2017. Beal, an All-Star the past two seasons, is fifth in the league in scoring at 27.8 points per game.
Wizards coach Scott Brooks said the injury is "nothing serious. Hopefully, he'll be back next game, but don't know that. Day-to-day from today. He feels better today.''
Gary Payton II, who was signed on Monday, started in Beal's place. The Wizards lost to the Knicks 107-100.
Washington's next game is Monday at home against the Miami Heat.
The Associated Press contributed to this report.