CHICAGO (AP) — Oakland Athletics catcher John Jaso remains out indefinitely with a concussion after visiting a specialist.

Manager Bob Melvin was hoping Jaso would be cleared to return after seeing Dr. Micky Collins in Pittsburgh on Wednesday. But the doctor wants Jaso to try a different routine.

Melvin says Jaso, sidelined since last month, will return to Oakland and won’t resume baseball activities for at least a few days. It’s too soon to speculate if he will miss the remainder of the year.

Jaso also sat out most of last season with concussion-like symptoms.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.