Gentry (concussion) reported feeling a little better but is not available to play Wednesday, Susan Slusser of the San Francisco Chronicle reports. This comes as no surprise, as Gentry was diagnosed with a concussion after colliding with White Sox second baseman Carlos Sanchez on Tuesday. Manager Bob Melvin said Gentry is still dealing with aftereffects from the concussion, and he will need to be fully cleared through league protocol before returning to action.