SAN FRANCISCO — Bruce Bochy tweaked a lineup that had produced no more than one run in 10 of the Giants’ first 21 games, and he got results on Monday night.
Buster Posey, moved from cleanup to the No. 3 spot, drove in the go-ahead run with a fifth-inning single and recent call-up Mac Williamson hit the Giants’ longest home run of the season in a 4-2 win over the Washington Nationals to open a 10-game homestand.
“Sometimes if you change it up it helps get things going a little bit,” Bochy said earlier.
Bochy dropped struggling leadoff hitter Austin Jackson to No.