SAN FRANCISCO -- Buster Posey hit a two-run homer in the first inning and drove in three, Tim Hudson pitched seven strong innings and the San Francisco Giants won their fifth straight, beating the Atlanta Braves 4-2 Friday night.
Hudson (3-4) gave up one run on five hits, striking out four and not walking a batter as he beat his 29th major league team. That left the Oakland Athletics, his first team, as the only one he has not beaten.
Mike Foltynewicz (3-2) was nearly as effective, retiring 11 in a row at one point. He gave up the two runs on five hits, walking one and striking out a career-high eight.
Freddie Freeman blasted his sixth homer of the season, a solo shot that easily cleared the center field fence in the ninth.
Foltynewicz recorded four outs in the seventh, including three on strikes, though two runners reached base on a wild pitch and the bases were loaded when he was replaced by Luis Avilan, who got Nori Aoki to ground into a forceout.
Posey added a ground-rule double in the eighth, scoring Joe Panik, who walked and stole second. Brandon Crawford, who had two hits, also singled in a run as the Giants moved into first place for the first time since opening day.
Hudson retired 13 of the final 14 batters he faced. He got 14 outs on grounders and struck out four.
Hunter Strickland pitched the eighth and Santiago Casilla got the final three outs for his 15th save in 17 chances, despite walking two.
Cameron Maybin had two hits and drove in a run for the Braves, who lost their fourth in five games. Andrelton Simmons also recorded a pair of hits and scored a run.
Giants pitchers went 39 consecutive scoreless innings at home before Maybin's third-inning single, matching a franchise record.
The Giants improved to 21-7 in May, matching their best record in any month since August of 1968. The franchise record is 24 wins in June of 1954.