The Associated Press

CHICAGO - Cubs first baseman Hee Seop Choi was in fair condition with a concussion Saturday following a violent collision with pitcher Kerry Wood in a game against the Yankees.

Choi lay motionless for several minutes after he was knocked to the ground and was taken off the field in an ambulance.

Choi was admitted to Illinois Masonic Medical Center, where he will remain for overnight evaluation. Cubs officials said Choi was moving and talking.

"I can tell you one thing. Hee Seop did ask how Woody was doing," Cubs trainer Dave Tumbas said without elaborating.

"He's moving and he's conscious. At least for now he's out of the danger zone," Cubs general manager Jim Hendry said.

With one out in the top of the fourth, Chicago put on a shift with New York star Jason Giambi at the plate. Giambi hit a high popup toward third, but third baseman Lenny Harris was near second base and had no chance at the ball and catcher Damian Miller couldn't pick it up because of the sun.

Wood and Choi raced toward the pop and Wood's glove hit Choi in the face.

Choi fell hard, slamming the back of his head on the dirt.

EXPOS: Slugger Vladimir Guerrero will undergo extensive therapy on his injured bad back over the next two weeks.

Guerrero went on the disabled list with a herniated disc Friday.

"He has a problem and he's going to get treatment now by extreme and extensive therapy," Expos assistant general manager Tony Siegle said. "Within two weeks we'll have an indication of whether it's working and go from there."

METS: Tom Glavine is likely to miss a start for the first time in his major-league career.

Bothered by a bone spur in his left elbow, the two-time Cy Young Award winner says he is "iffy at best" for his next start, Wednesday at Texas.