SAN FRANCISCO — Patrick Bailey’s numbers have taken a second-half dive for a second consecutive season, but the Giants don’t believe it’s fatigue this time around.
Bailey continues to tell manager Bob Melvin that he wants to start behind the plate every day, and he had enough left in the tank after a weekend in Oakland to show up early Monday for extra batting practice, which the Giants hoped would break him out of his slump.
Instead, the swings might have sidelined the catcher for this series. Bailey was scratched about two hours before first pitch because of tightness on his right side, but the Giants didn’t miss a beat. Curt Casali drove in the first run in a 5-3 win over the Chicago White Sox and did a pretty good Bailey impersonation behind the plate during a hairy ninth inning…