Gonzalez done

? Kansas City Royals outfielder Juan Gonzalez is expected to miss the rest of the season because of a lower back injury.

Gonzalez has been sidelined since May 22. He was examined by spine specialist Dr. Robert Watkins in Los Angeles this week after experiencing discomfort while on a rehabilitation assignment with the rookie league Arizona Royals.

The Royals optioned pitcher Jimmy Gobble to Triple-A Omaha after losing 2-0 to Tampa Bay on Thursday night.