INGLEWOOD, CALIF., FEB. 3 -- Magic Johnson was knocked unconscious today in the third quarter of the Los Angeles Lakers' 99-86 victory over the Chicago Bulls, and was taken to a hospital for overnight observation.

"I gather he didn't know we were playing a game or where he was," Lakers Coach Mike Dunleavy said after his team's NBA-season-best 15th straight triumph. The wins match the second-longest winning streak in franchise history. Los Angeles won 15 in a row in 1987-88; it won an NBA-record 33 consecutive games in 1971-72.

In the last minute of the third quarter, Johnson tripped over teammate Terry Teagle's left leg while backpedaling on defense. Chicago's Horace Grant accidentally kicked Johnson in the head while driving to the basket, which sent Johnson's head to the court.

Team trainer Gary Vitti said Johnson was unconscious for "one or two minutes" before standing up and leaving the court with the help of teammates, and suffered from "retrograde amnesia."

Team doctor Stephen Lombardo, who examined Johnson, said in a statement Johnson "has a concussion and was taken to Centinela Hospital Medical Center for further examination by a neurologist, and will be kept overnight. When he left, he was alert and under his own power."

Even without Johnson, who had 7 points, 11 assists and 7 rebounds, the Lakers had little trouble in the fourth quarter of a close game. Rookie Tony Smith, who has established himself as Johnson's backup ahead of veteran Larry Drew, scored six of his eight points in the period and made only one turnover, helping Los Angeles pull away.

Los Angeles did so with strong defense, holding Michael Jordan to 23 points. Scottie Pippen led the Bulls with 24.

"I wasn't counting on {Johnson} coming back," Dunleavy said. "I was just hoping he was fine. . . . The next step for us is to see how he does" Monday.

"It's all happened to everybody in here," said Lakers reserve center Mychal Thompson, who played in his 1,000th NBA game and saw the play from the bench. "He really didn't hit his head hard on the floor. He just collided with one of his teammates."

It is unclear if Johnson, who has missed only two of 45 games, will play Tuesday against the Clippers.

"It was a scary moment for him, but Magic is tough," Thompson said.