(Sports Network) - Roy Oswalt and Randy Johnson will have a tough time duplicating the magnificent performance from Tim Lincecum on Saturday when the two starters face off this afternoon in the finale of the three-game set between the Houston Astros and San Francisco Giants at AT&T Park.

Lincecum fired seven innings of three-hit shutout ball, and the Giants bats produced a second straight solid effort in a 9-0 win against the Astros on Saturday.

Fresh off being named the NL's Pitcher of the Month for June, Lincecum (9-2), won for the fifth time in his last six starts and for the ninth time in his last 10 decisions.

The reigning Cy Young Award winner for the Senior Circuit struck out nine, walked two and walked twice himself, scoring both times. He has now allowed two runs or less in eight of his last nine outings and has fanned at least eight batters in each of his last five starts.

"He is one of the best. Those elite players get on a roll and it's impressive. He is commanding all his pitches. It's enjoyable to watch," Giants manager Bruce Bochy said.

San Francisco pounded out the nine runs on 12 hits one day after taking the opener to this three-game set in similar fashion, 13-0. Aaron Rowand and Randy Winn had a pair of RBI each, while Pablo Sandoval reached base four times with two hits and two walks, driving in a run in the win.

Former Giants right-hander Russ Ortiz (3-4) was tagged for nine hits and eight runs with five walks in a 5 2/3-inning start. Houston had entered the series winners in six of its previous eight but have managed just seven hits in the first two games versus the Giants.

Johnson will once again try to hold the Astros' bats at bay this afternoon, as he attempts to win his third consecutive start and his fourth straight decision. Johnson won for the fifth time in his last six decisions on Tuesday in St. Louis, as he allowed just three runs and four hits in 5 1/3 innings to up his record to 8-5 to go along with a 4.70 ERA.

The 45-year-old left-hander has faced the Astros seven times and is 4-1 with a 3.64 ERA.

Oswalt, meanwhile, is 4-4 with a 4.02 ERA on the year, but is coming off his best effort of the season in his last start. Oswalt went the distance to beat the San Diego Padres on Monday, limiting them to just a run and two hits, while striking out eight.

The 31-year-old righty is 4-5 lifetime against the Giants with a 3.98 ERA in 12 starts.

Houston and San Francisco are meeting for the first time since the Astros took seven of the eight meetings a year ago. Houston went 3-1 at AT&T Park in 2008.

The Giants last swept the Astros in a three-game set from May 21-23, 2007.