Longtime Oakland Athletics star Eric Chavez is injured once again and acknowledges his career could be over.

"It might be," Chavez said Saturday. "I don't know what the future's going to hold."

Oakland placed its longest-tenured player on the 15-day disabled list because of what he called two bulging disks in his neck. The team referred to the injury as neck spasms and manager Bob Geren wouldn't speculate on the severity.

The 32-year-old designated hitter has been having spasms on both sides of his neck since getting hurt during a spring training drill.

Chavez has spent all 13 of his major league seasons with the A's. He is batting .234 with one home run and 10 RBIs this year.

Cardinals. Cardinals pitcher Brad Penny was put on the 15-day disabled list with a strain his upper back, although the team believes it's a minor injury.

Astros. Houston ace Roy Oswalt says he has not demanded a trade, but thinks a deal might be best for everyone. Oswalt, 32, says he has a few teams in mind, but wouldn't specify them.

Nationals. Lefthander Scott Olsen will miss his next scheduled start for Washington because of inflammation in his pitching shoulder.

- Associated Press