Aug 21, 2010 7:56 PM EST

The Mets don't expect to get outfielder Jason Bay back this season.

Bay suffered a concussion at Dodger Stadium four weeks ago while crashing into the left-field wall.

"That's the way I see it," manager Jerry Manuel said. "I could be way out of line, or way out of bounds. But that's the way I see it."

A team official said Bay cannot go 48 hours without a recurrence of concussion-related symptoms.

Via ESPN