OAKLAND, Calif. (AP) — Minnesota Twins catcher Joe Mauer provided enough encouraging signs during his workout Thursday that general manager Terry Ryan and manager Ron Gardenhire remain optimistic he will play again this season after a concussion.

After Mauer spent three days at home, he returned to the ballpark to do some cardio exercise and leg work. He hasn’t resumed baseball activities, but that could come soon.

Mauer is no longer experiencing headaches or other concussion symptoms, Ryan said. The GM hadn’t spoken to Mauer, but was in touch with the training staff.

Ryan said keeping Mauer at home for a few days seems to have proved the right move considering his session Thursday. While Ryan didn’t have specifics on how long Mauer was able to exercise, he believed it was more than last time.

Mauer took a foul ball in the mask on Aug. 19. Mauer hasn’t had an IMPACT concussion test for about a week, but he is expected to re-join the team Monday back in Minneapolis if all continues to progress.

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