Shaum Marcum is used to being overshadowed.
The Milwaukee starter was signed just before former Cy Young Award-winner Zack Greinke in the offseason.
On Monday, the right-hander pitched two quiet innings for the Brewers and left before Mark DeRosa hit a tiebreaking homer to help the San Francisco Giants beat a Milwaukee split squad 10-9.
"I have flown under the radar my whole life," Marcum said. "Hopefully, the teams (opponents) will forget about me, too."
Marcum had 165 strikeouts in 195 innings last season, a year after missing 2008 because he had Tommy John surgery. Now Milwaukee is hoping Greinke and Marcum can help the Brewers contend.
"I haven't won a Cy Young," Marcum said.
He still could have the stuff to help Milwaukee win the NL Central. Marcum's best, most deceptive pitch is his changeup.
"Even when the hitter sits, his hand speed is so fast that the eyes see fastball," said Brewers first-year manager Ron Roenicke.
For the Giants, DeRosa is making a bid for starting time, even though manager Bruce Bochy plans to use him as a sub at all infield positions.
DeRosa played second base Monday while Freddy Sanchez finishes healing from shoulder surgery.
He has been impressive. He is healthy now," said Giants manager Bruce Bochy. "He is a lot more confident. He doesn't have to (start his swing early). He can handle any pitch."
Barry Zito allowed five walks along with two runs and three hits in 1 2-3 innings.
Bochy also was encouraged by the effort of right-hander Jeff Suppan, making a bid to become the No. 5 starter or long reliever. Suppan pitched three hitless innings of relief against his former Milwaukee teammates, striking out two.
Notes: Greinke will make his first start as a Brewer on Tuesday against the White Sox in Glendale. ... The Giants trailed 5-4 before scoring six runs in the seventh. The big hit was a two-run double by first base prospect Brandon Belt, who had a second double and a single and four RBIs ... The Giants left Zito off their playoff roster in 2010, and Monday might have been an example of why. One of his five walks was of Prince Fielder with the bases loaded. Fielder and Zito barked at each other, apparently a holdover from last spring when Zito hit Fielder with the first pitch of the spring. Both players downplayed the latest spat ... Closer Brian Wilson (back) is nearly ready to pitch in a game, Bochy said. ... Giants RHP Tim Lincecum will make his second spring start on Tuesday against the Cubs in Scottsdale. ... Brewers broadcaster Bob Uecker was back at the microphone. He had a second round of heart surgery in October 2010.