OAKLAND -- Coco Crisp received a cortisone shot Tuesday night in his aching left wrist, injured when he made a diving backhanded catch on Toronto's artificial turf Sunday.
A's manager Bob Melvin said the injection would keep his leadoff-hitting center fielder from swinging a bat for "at least a day or so."
Still, it could accelerate the healing process in his wrist. Crisp appeared in Tuesday night's loss to Houston as a pinch-runner.
Concussed catcher John Jaso, on the 7-day disabled list since July 25, will begin "visual" exercises, as well as his physical activity of bike riding and weight lifting, but he has not been cleared for baseball activity yet.
"It's going to take some time," Melvin said.
Asked if he thought Jaso's concussion could be a season-ending situation, Melvin shook his head.
"I don't know," he said. "You certainly hope not. But there is no timetable (for Jaso's return)."
It has been 20 days since Jaso was D.L'd so he was automatically transferred to the 15-day D.L. when he was not reinstated in 14 days.
Melvin said that catcher Derek Norris, whose back locked up on him Saturday in Toronto, should be a "useable piece" Wednesday night, and the plan remains that he starts Thursday's series finale against the Astros, catching rookie Sonny Gray's first big league start in Oakland. It will also be Gray's first appearance in the O.co Coliseum.