SAN FRANCISCO — Brian McCann hit a two-run homer and an RBI single in his third game this season after coming off the disabled list, and the Atlanta Braves beat the San Francisco Giants 6-3 on Thursday night to begin a four-game series between NL division leaders. Freddie Freeman and B.J. Upton both drove in a run to help back Julio Teheran (2-0), who pitched seven efficient innings in his 10th career start after his last scheduled outing was rained out Saturday against the Mets. Craig Kimbrel earned his 100th career save, becoming the second-youngest pitcher to do so.