Associated Press

Wizards point guard John Wall called his upcoming absence because of a left knee injury ‘‘a minor setback.’’ Team president Ernie Grunfeld labeled it ‘‘a bump in the road.’’

However it’s described, Wall is expected to miss the first dozen or so games of the regular season after the Wizards announced Friday that their best player — the No. 1 overall pick in the 2010 draft — was diagnosed with the early stages of a stress injury to his left kneecap.

The Wizards said the injury does not require surgery. If his rehab goes as expected, Wall will be sidelined for about two months, including about the first month of the regular season.

Advertisement - Continue Reading Below

Wall said he ‘‘started feeling discomfort’’ about a month ago, and he got an MRI exam that Grunfeld said did not show any sort of problem. But Wall still was bothered by his knee while working out and went for a second opinion.

He was examined Thursday in New York by orthopedic specialist David Altchek, and a new MRI revealed the injury.

‘‘Just something that happens when you work out very hard, that’s all I can say,’’ Wall said.

‘‘It’s very tough for me,’’ he added.

Wall led the Wizards by averaging 16.3 points and eight assists last season. He also topped the team with 95 steals and averaged 4.5 rebounds.

The Wizards finished 20-46 during the lockout-shortened 2011-12 season, the second-worst record in the league.

‘‘The good thing about this is that we caught it when we did. It’s not going to be a best-case scenario, but we also have to look at this in a positive way,” said Wizards coach Randy Wittman. “My expectations of what John can do this year, it being his third year, is not going to change. He’s just going to start a little later.’’