Rockies starter Jorge De La Rosa hasn't lost since early August, and he'll try to pick up his seventh consecutive victory when he faces the Giants on Tuesday at AT&T Park.
De La Rosa (16-6, 3.31 ERA), the lone lefty in Colorado's rotation, quietly surged to the top of the National League with 16 wins -- tied with Adam Wainwright and Jordan Zimmermann for the lead -- behind five wins in August. He hasn't blown by opposing lineups, but De La Rosa has been a mark of consistency, allowing three earned runs or fewer since his winning streak began.
He tied his career high in wins with a 7-5 decision over the Dodgers on Wednesday. And De La Rosa's posted the best numbers of his career despite pitching through a left thumb bruise since mid-June.
"There have been a couple of times where it flared up real good and we thought he would miss a start, maybe even [disabled list]," Rockies manager Walt Weiss said after the southpaw allowed two runs over six innings Wednesday. "We've talked about that route when it was at his worst. But he seems to bounce back and he seems to be able to pitch with it."
Though the Giants are officially out of the NL West race, a win Tuesday would hand them their second series victory of September. San Francisco rallied for a 3-2 victory Monday night, a walk-off single in extra innings powering them to victory for the second time in as many games.
The wins haven't come easily for San Francisco, Monday's win marking just the second time in 22 tries the Giants have won consecutive games.
Home field has provided separation between the division rivals, the Rockies 7-3 against the Giants at Coors Field but 1-6 at AT&T Park.
Ryan Vogelsong (3-5, 5.62) takes the mound for the Giants as he tries to build upon a resurgent August. Vogelsong limped through April and May before a broken pitching hand knocked him from the starting rotation.
But he showed promising improvement in his first month back from injury, and the right-hander has a strong record of success against the Rockies. In 12 games (seven starts) facing Colorado, Vogelsong is 5-1 with a 2.68 ERA -- his second-lowest against any club.
After making it past the sixth inning in his last three starts, Vogelsong gave up four runs in 4 2/3 innings in a loss to the D-backs on Thursday.
"This one's on me," Voeglsong said following that start. "Nobody else.
"I made some bad decisions on some pitch selections and then on top of that I didn't execute the ones I picked."
Giants: Adrianza makes history in debut
Ehire Adrianza's Major League debut made little noise but closed with a lasting boom.
Adrianza crossed home for the winning run in Sunday's 11-inning 3-2 win over the D-backs, serving as a pinch-runner for Hector Sanchez after he led off the final inning with a single. The 24-year-old rookie scored on Angel Pagan's walk-off single, etching his name into the back pages of the record books by becoming the first Giants player since 1941 to score the deciding run in extra innings in his first big league game.
The shortstop split the season between Double-A Richmond and Triple-A Fresno, hitting .310 with seven doubles, six triples and 12 RBIs in 45 games with the Grizzlies. The Giants have invited Adrianza to Spring Training for the last four years, but he's largely built a reputation on his strong defensive play.
Rockies: Oswalt joins 100-hit club
Roy Oswalt's first Major League appearance in two months was anything but memorable Monday night.
Oswalt surrendered five runs in 3 1/3 innings and picked up the loss against the Padres, bumping his ERA to an unsavory 8.57. But a seventh-inning single gave him 100 career hits.
It was his first hit since Aug. 7, 2011, and leaves him with the second-most among active pitchers, trailing only Padres pitcher Jason Marquis' 127 hits.
• De La Rosa can tie a franchise record with a seventh straight victory Tuesday. De La Rosa himself won seven consecutive decisions in 2009 and former Rockies All-Star Ubaldo Jimenez matched that mark in 2010.
• Giants third baseman Pablo Sandoval is 10-for-31 with four doubles, a homer and four RBIs off De La Rosa.
Ian McCue is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.