They won't tell the story to the public. These guys are prideful, uber-macho jocks. I'd bet a lot of money that they asked him if he wanted to take time off or go on the DL, and he told them, No—same thing with Dansby, who played with a damn hernia most of last year.
They should let the medical staff decide what needs to be done. Tucker was still getting on base, but now he's Jason Heywarding because his swing is out of whack.