In a matter of minutes, following a terrifying, split-second sound that resonated around AT&T Park, the Giants’ list of early season concerns shrunk to one: Buster Posey.
The shaky bullpen. The erratic starting rotation. The experiment in left field. One or two of those issues are likely to persist for another day, perhaps for the entire season. But the 2017 home opener against the Arizona Diamondbacks – on a day that is normally a festive, joyful occasion in the Bay Area – morphed into an unusually subdued affair, the Giants’ encouraging 4-1 victory notwithstanding.