SAN FRANCISCO -- Madison Bumgarner pitched himself into the San Francisco record book, took a share of the major league lead for wins and, most important to the soft-spoken southpaw, moved his team one step closer in an NL West race that could go down to the wire.
Bumgarner struck out eight on the way to his 18th victory, and the Giants moved within one game of NL West-leading Los Angeles by beating the Dodgers 9-0 on Friday night.
"It's not hard to get up for the Dodgers series, especially the circumstances we're in," Bumgarner said. "The offense did an unbelievable job and kept scoring runs."
Pinch hitter Travis Ishikawa splashed a three-run homer into McCovey Cove, and Brandon Crawford hit a two-run drive in the fifth to help Bumgarner win his fifth straight start. Buster Posey and Crawford hit RBI doubles in the first as the Giants jumped on Hyun-Jin Ryu (14-7).
The Dodgers' left-hander exited after only one inning because of irritation in his pitching shoulder. He said it's similar to the problem he dealt with in May that landed him on the disabled list, raising doubt whether he will pitch again this season.
Ryu will be re-examined Saturday in the Bay Area.
"I'm staying positive. I felt this before in the past, so hopefully it will be the same time that it took to recover from that," Ryu said through a translator. "I think it was a week or two."
San Francisco, which leads the NL wild-card race, is one game back of Los Angeles for the first time since Aug. 4. The Giants have won a season-best 10 straight home games after handing the Dodgers their fifth shutout loss.
This group has its swagger back at home.
"It's as good as it can be. It's been that way for a while now," Bumgarner said. "We've got a lot of guys who have been here and done this before."
Bumgarner (18-9) reached 200 strikeouts for the first time in his career when he fanned Scott Van Slyke in the second. The lefty is tied with Dodgers Sunday starter Clayton Kershaw, Cincinnati's Johnny Cueto and the Cardinals' Adam Wainwright for most wins in the majors.
Los Angeles lined up its top starters for this series, while Giants manager Bruce Bochy opted to keep his pitchers on their regular schedule because things have been working well so far in September.
"It's for first place. We're a game behind them," Crawford said. "We know the stakes."
The Dodgers had the best road record in baseball and swept the Giants in three games at AT&T Park from July 25-27 -- outscoring San Francisco 17-4.
"It's live theater every night, we just don't know the ending here," Dodgers manager Don Mattingly said before the game.
San Francisco's home winning streak is its longest since an 11-game run from July 7-25, 2003, which is the best in the 15-year history of AT&T Park. The shutout matched the Giants' largest at home against the Dodgers since moving to San Francisco in 1958.
The Giants also beat Los Angeles 9-0 on June 25, 1968.
Bumgarner needs two wins over his final three starts to become the Giants' first 20-game winner since John Burkett (22) and Bill Swift (21) in 1993. Bumgarner has 207 strikeouts, most in a season by a San Francisco left-hander.
Ishikawa's second career pinch-hit homer was the 102nd into the water and 67th by a San Francisco hitter.
"It's a big series," Bochy said. "Any time you can jump ahead, it's huge for the club."
Dodgers: LHP Paco Rodriguez, on the disabled list since Aug. 4 with a strained muscle below his pitching shoulder, threw a simulated game that went well. If he bounces back fine, Mattingly said a decision could be made as soon as Saturday about activating Rodriguez.
Giants: 1B Brandon Belt took batting practice a day after being medically cleared from a concussion. ... OF-1B Michael Morse missed his 10th straight game with a strained left oblique. He took some pregame swings but still needs at least a couple of days.
Dodgers: RHP Zack Greinke (14-8, 2.73 ERA) puts his unbeaten mark against NL West opponents this season on the line in the middle game of the series. He is 9-0 in 12 starts versus the division.
Giants: RHP Tim Hudson (9-10, 3.12) makes his 16th career start against the Dodgers and second this season, trying to end a two-start skid.