SAN FRANCISCO — This is a story about potential second-half storylines for the San Francisco Giants. Their best-case scenario might be, “None of the things that were storylines in the first half.”The Giants couldn’t hit in April. They couldn’t pitch in May. Through it all, their bullpen was consistent … in the way that an uncontained wildfire consistently turns acreage to ash. It wasn’t merely that they kept losing series after series. It’s how they lost them: with sloppy and unfocused play, a minimum of strategic acumen and worrisome regression from core players signed to inescapably long contracts.A different issue seemingly cropped up every day, from questionable pitching decisions to Rafael Devers’ insubordination when he balked at being lifted for a pinch runner to the Pride Day controversy that became fodder for culture wars. The disparate incidents all had one thing in common. They made you wonder whether the Giants had enough adults in the room.The Giants sure as heck weren’t boring. But they were hardly entertaining. Here are three storylines to watch in a second half that still has a chance to be fascinating — as long as you don’t peek at the standings.Ken’s Week in Baseball: Four teams to watch as trade deadline nearsKen RosenthalWho will be left after Aug. 3?Last year as the trade deadline approached, the Giants were 54-49 before getting skunked on a six-game homestand against the New York Mets and Pittsburgh Pirates. They were just a game under .500, but Giants president of baseball operations Buster Posey had seen enough. He became an aggressive seller, moving impending free agents Tyler Rogers and Mike Yastrzemski as well as former All-Star closer Camilo Doval.So there’s no doubting what course the Giants will chart at the deadline this season. They were out of it before Memorial Day and, after losing a home series finale to the Toronto Blue Jays on July 8, they sank to 16 games under .500 for the first time since the final day of the 2018 season.