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5/30/2014 7:22 P.M. ET

Giants play it safe, scratch Cain's next start

ST. LOUIS -- The Giants remained cautious with Matt Cain's strained right hamstring, as manager Bruce Bochy announced Friday that the right-hander will not make his scheduled start Saturday.

Instead of facing the St. Louis Cardinals, Cain will be placed on the 15-day disabled list retroactive to May 22, the day after he injured himself while pitching at Colorado. Bochy said Cain will be activated next Friday to face the New York Mets at AT&T Park.

Bochy said right-hander Yusmeiro Petit will replace Cain on Saturday against St. Louis. The Giants also announced that Cain's roster spot will be filled by outfielder Juan Perez, who officially will be recalled Saturday.

This will be Cain's fourth missed start due to injury. A cut on his right index finger sent him to the disabled list in late April and forced him to skip two starts. The Giants are exercising similar care with his hamstring, a delicate area for many athletes once it's injured.

The Giants might literally and figuratively have removed the wraps from Cain if this were a crucial game.

"If this were September, he probably would start," Bochy said.

But, said Bochy, "We're going to take the safe route and wait a few more days until we're convinced that he's 100 percent over this."

Bochy said Cain has recovered nicely overall but recently felt "a little something" in the hamstring. "We don't want to put him in a situation where he's at risk of reinjuring this," Bochy said.

Cain, the Giants' No. 2 starter, is 1-3 with a 3.66 ERA in eight games.

Bochy appreciates flexibility in Giants' roster

ST. LOUIS -- Giants manager Bruce Bochy cited "character" as he discussed his club's ability to build the Major Leagues' best record despite multiple injuries.

Right-hander Matt Cain will miss his fourth start of the season Saturday. Right-hander Tim Hudson has missed one. First baseman Brandon Belt's fractured left thumb sidelined him in early May and could keep him inactive until the All-Star break. Second baseman Marco Scutaro has been rehabilitating his back all year. Catcher Buster Posey's back has limited his playing time. Top setup reliever Santiago Casilla is expected to miss a month.

Nevertheless, Bochy said Friday, the Giants "[aren't] thinking or dwelling on anything that's happened. They've done a tremendous job of picking each other up. That's the only way this is going to work, I think."

Bochy acknowledged that though the Giants might lack enviable 25-man depth, they possess enough roster flexibility to ease the impact of the injuries. Yusmeiro Petit has been an ideal emergency starter. Michael Morse has made a smooth transition from left field to first base. Brandon Hicks has settled in at second base. And left fielder Tyler Colvin has proven helpful.

"These guys have done a nice job of contributing on a daily basis," Bochy said. "We've gotten contributions throughout the lineup."

Kuiper has advice for Revere after first homer

ST. LOUIS -- Duane Kuiper understands the art of the home run. That's singular, not plural.

Thus, the Giants broadcaster wasn't overwhelmed by the news that Philadelphia's Ben Revere hit his first home run Tuesday in his 1,466th Major League at-bat. Kuiper, who walloped one homer in 3,379 at-bats during his 12-year career, wants to see how Revere handles the power of one.

"Now he's got one. So now he has to stop. That's the really tricky part," Kuiper said Friday, displaying his dry sense of humor. "When he hits one [high and deep], he has to say, 'Stay in here, stay in here,' instead of 'Get out, get out.' That's very hard to do."

Kuiper pointed out that Revere plays at hitter-friendly Citizens Bank Park, which typically enhances power.

"He's in a park where he should hit two or three a year," Kuiper said.

Moreover, Revere possesses above-average speed, making inside-the-park homers a possibility.

"So he has to think about stopping at third base, too. I stopped at third a bunch of times," Kuiper said. He paused before adding, "Well, not really. That may be an exaggeration."

Chris Haft is a reporter for MLB.com. Read his blog, Haft-Baked Ideas, and follow him on Twitter at @sfgiantsbeat. This story was not subject to the approval of Major League Baseball or its clubs.