Padres RF Brian Giles left yesterday's game against the Rockies in the third inning after a collision with CF Dave Roberts.

Giles and Roberts both were attempting to field a double by Choo Freeman in the second inning. Television replays showed that Roberts's right knee collided with Giles's right knee.

Giles fell and remained down for a few minutes while trainer Todd Hutcheson worked on his knee. He stayed in the game, but came out the next inning after hitting a double down the right field line. His injury is being called a bruised right knee.

Giles is scheduled to undergo an MRI exam to rule out any further damage. The fear is that there may be ligament damage to the knee in which Giles suffered a strained ligament in April 2003 while playing for the Pirates. He was forced to go on the disabled list and missed 23 games.

"I think it's fair to say he is one guy we can't lose," Padres Manager Bruce Bochy said. "That would be a tremendous blow for us if we had him go down."

Giles leads the majors with 96 walks and has a team-high 68 RBI.

* RYNO'S NUMBER RETIRED: The Cubs retired Hall of Famer Ryne Sandberg's number before their game against the Marlins.

In the pregame ceremony, the team presented a framed replica of Sandberg's No. 23 jersey and hung his number on the right field foul pole. He is the fourth Cub to have his number retired, joining Billy Williams, Ron Santo and Ernie Banks.

* WOOD MAY BE DONE: With their wild-card hopes flickering, the Cubs may decide this week to shut down RHP Kerry Wood for the rest of the season. Wood, who needs surgery on his right shoulder, has pitched in relief since returning Aug. 5 from his second stint on the DL.

-- From News Services

Padres right fielder Brian Giles hits the ground after running into center fielder Dave Roberts.