Hector Sanchez was diagnosed with a second concussion and Giants manager Bruce Bochy acknowledged the switch-hitting catcher’s season could be over. “Sure, it has to be (a possibility) with the second one,” Bochy said of Sanchez, who took another foul tip off the mask in a rehab game for Triple-A Fresno on Saturday. Sanchez was evaluated by Giants physician Dr. Anthony Saglimbeni on Tuesday. As for first baseman Brandon Belt, who is also on the 7-day DL for players with concussion symptoms, he is being examined and evaluated today by Dr. Micky Collins at the University of Pittsburgh Medical Center. Bochy hoped to have an update later Tuesday. Sanchez took his latest foul tip while wearing the older style two-piece mask, Bochy said. Sanchez had switched from using the hockey-style mask, which provides more coverage but also does not sit flush on the face and thus can vibrate violently when struck.