SAN FRANCISCO -- Randy Johnson tossed seven shutout innings to win his fourth consecutive start and the Arizona Diamondbacks completed their first sweep in San Francisco in seven years, beating the Giants 7-2 on Sunday.
Conor Jackson had three hits, including a home run for the NL West-leading Diamondbacks, who have won five of six to move two games over .500 for the first time since June 24. Mark Reynolds added a two-run homer and Stephen Drew drove in a pair of runs.
Fred Lewis had four hits for the Giants, who have lost 12 of their last 16 games. Ivan Ochoa and Randy Winn each had two hits.
Johnson (8-7) earned his first win in San Francisco since July 16, 2002. He allowed nine hits, struck out two and did not walk a batter.
Johnson, who recorded career win No. 292, extended his scoreless inning streak to 15, his longest since 19 straight in September 2002.
The second-most prolific strikeout pitcher even threw a pitch so slow to Lewis in the first inning -- for a strike -- that the radar gun was unable to register its speed.
Barry Zito (5-13) became the first 13-game loser in the majors, giving up six runs and six hits in five innings. He walked five and struck out four.