Results of X-rays and an MRI, however, revealed otherwise.
James suffered a broken right foot on Thursday night against the Dallas Mavericks according to head coach Avery Johnson, who said James will visit with doctors on Sunday.
James will undergo surgery on Monday at the Hospital for Special Surgery in New York. A timetable for his return will be announced following the surgery, the team announced.
"It's bad news for the kid and for us because he was just starting to come on," Johnson said of James, who made his first career start Thursday.
The Nets lost, 99-92.
James, acquired by the Nets in a draft day trade after being selected 24th overall by the Atlanta Hawks, was averaging 3.1 points and 2.9 rebounds per game. He dropped in a career-best 10 points in 19 minutes on Tuesday versus the Hawks, prompting Johnson to insert him into the starting unit in favor of the slumping Travis Outlaw.
Johnson said he'll continue to bring Outlaw off the bench.
"It didn't look good in the Dallas game," Johnson said of Outlaw, who was 0-for-7 from the field in 18 minutes. "But we gotta give it a little longer than one game."
Point guard Devin Harris started Sunday afternoon against the Lakers.
Harris had suffered a sprained left shoulder against the Mavericks, but Johnson said he went through a 50-minute workout Saturday night and came out of it "pretty good."
"We're definitely going to need his energy," Johnson said of Harris, who is averaging 16.3 points and 6.4 assists per contest.
Harris had 16 points in Sunday's game.
Rookie power forward Derrick Favors was also back after sitting out the Dallas game with a bruised thigh. He scored 8 points off the bench in the Nets' loss.
Mike Mazzeo is a regular contributor to ESPNNewYork.com.