© 2013 MLB Advanced Media, L.P. All rights reserved.

05/08/2013 4:28 PM ET

Cautious Giants rest Pagan with groin strain

SAN FRANCISCO -- The Giants received what manager Bruce Bochy termed as good news about center fielder Angel Pagan, who was out of Wednesday's lineup with a mild strain of his right groin.

The injury, officially diagnosed as a strained adductor muscle, was discovered Wednesday morning when Pagan underwent an MRI.

Bochy said the ailment was so minor that Pagan could have started the series finale against the Philadelphia Phillies. But Bochy exercised caution.

"The last thing we need is to have a setback with him," Bochy said.

Bochy believed that Pagan could rejoin the lineup as early as Thursday, when the Giants open a four-game series against Atlanta.

"We feel like this is going to go away," Bochy said. "He's going to be fine."

Pagan's injury hampers him only when he hits, Bochy said. Batting left-handed Tuesday, Pagan looked noticeably awkward on a couple of swings while going 0-for-3.

"When he rotates on his swing is when he feels it," Bochy said.

Pagan, who also missed two games during last weekend's Dodgers series with a strained right hamstring, entered Wednesday tied for fifth in the National League with 24 runs scored. He's hitting .268 with only one hit in his previous 11 at-bats.

In Pagan's absence, Gregor Blanco started in center field for the second time this season.

Casilla exits game with right knee injury

SAN FRANCISCO -- Giants right-hander Santiago Casilla left Wednesday's game against the Philadelphia Phillies during the eighth inning with an injured right knee.

Other than that, not much was known about Castilla's injury. Manager Bruce Bochy said after the Giants' 4-3, 10-inning victory that the club will learn more when the reliever undergoes an MRI examination either later Wednesday or Thursday.

Bochy revealed that Casilla actually was hurt before he entered the game to preserve San Francisco's 3-1 lead with one out in the eighth inning and Carlos Ruiz on first base.

"The knee was bothering him," Bochy said, adding that Casilla might have misled the Giants about the extent of his injury.

Nevertheless, Casilla faced two batters and generated two outs, fanning pinch-hitter Ryan Howard and inducing Ben Revere's fielder's choice grounder before leaving the game. It was initially believed that Casilla hurt himself while covering first base on the latter play.

Casilla is San Francisco's top right-handed setup man, owning a 3-2 record with a 2.12 ERA and one save in 19 appearances.

Kontos relieved to hear good friend Happ is OK

SAN FRANCISCO -- Giants right-hander George Kontos received immediate peace of mind late Tuesday night in the form of a text message from his friend, J.A. Happ, the Toronto left-hander who was struck by a line drive earlier that evening.

Happ, who sustained a head contusion and a laceration to his left ear, was released from a hospital Wednesday. By then, Kontos already knew that his former Northwestern University teammate was in stable condition. Kontos said that he texted Happ shortly after the Giants game ended and got an answer 45 minutes later.

"I'm sure he got a lot of text messages from relatives that he had to get back to," Kontos said Wednesday. "The fact that he responded was a good sign."

Then again, Kontos probably seems like family to Happ, since they're offseason workout partners in the Chicago area.

"I see the guy five times a week during the offseason. We spend quite a bit of time together," Kontos said. "It's good that he seems OK and hopefully nothing unexpected pops up."

Two-time cancer survivor named honorary bat girl

SAN FRANCISCO -- Wanda Zimmerman shares her May 6 birthday with Giants legend Willie Mays. But that's not her only distinctive quality.

Zimmerman, who was named Wednesday by Major League Baseball as the Giants' honorary bat girl for Sunday's Mother's Day game against Atlanta, survived breast cancer twice.

"I lost my hair," Zimmerman said in a statement, referring to the effects of her radiation and chemotherapy treatments, "but not my ability to fight this disease!"

Zimmerman was initially diagnosed with breast cancer in October 2003. She underwent extensive treatments and passed the five-year remission mark. Shortly afterward, however, she discovered a lump in her reconstructed breast. Doctors concluded that it was a recurrence of her first bout with cancer. But they couldn't explain how the cancer returned in new tissue following a mastectomy.

Zimmerman said that none of the procedures she would endure -- and she experienced plenty -- would be as difficult as informing her two sons that she had cancer again. Zimmerman proceeded to undergo two lumpectomies. Then came a year of chemotherapy and 17 weeks of radiation.

The Honorary Bat Girl Contest recognizes baseball fans who have been affected by breast cancer and demonstrate a commitment to eradicating the disease.

Chris Haft is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.