CHICAGO -- The Cubs may have to dip into the Minor League system again after both first baseman Daryle Ward and outfielder Cliff Floyd had to leave Thursday's game against the San Francisco Giants because of injuries.

Ward departed with a strained right calf and underwent an MRI at Northwestern Memorial Hospital. He had been on the disabled list with a strained left hip from June 3-18 and was subbing at first base for Derrek Lee, who is serving a five-game suspension. Thursday was Day 2 for Lee.

"We'll evaluate the situation in the morning," Cubs manager Lou Piniella said. "Cliff was dizzy. Daryle, it was his calf muscle. I think he pulled it. We won't know until [Friday]."

Ward was trying to grab Pedro Feliz's infield popup in front of the pitcher's mound and converged with three other players. He fell as he tried to make the play and immediately was pulled from the game. His status is day to day.

Mark DeRosa, who was supposed to get Thursday off, replaced Ward on defense.

Floyd collided with pitcher Matt Morris in the third inning and stayed in the game. He eventually scored from second on a passed ball by catcher Bengie Molina, but was lifted on defense in the fourth.

"I was going on straight adrenaline there," Floyd said of his dash. "I was ticked off at the world. I was ticked I didn't go to third, and felt I needed to do something."

Floyd, who has been battling shoulder and elbow problems, was pulled because of a sore neck.

"I don't feel great, but I don't feel horrendous either," Floyd said. "I'm a little upset and at the same time a little banged up, also. When you hit the ground like that and you don't know which way you're going, you don't know what's going to happen. Right now, my neck and my whole left side took a hit."

When the season began, the Cubs wanted to be careful so Floyd didn't aggravate a tender Achilles tendon. That hasn't been a problem, just what Floyd calls "these nagging stupid things." Does he feel snake-bit?

"I've had that for a while, for a long time in my career," Floyd said. "Things that I didn't think would happen are happening. But if I don't go hard there, it's probably a double play."