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7/29/2014 8:50 P.M. ET

Davis out of O's lineup with flu-like symptoms

BALTIMORE -- Dealing with flu-like symptoms, Chris Davis was out of the lineup for Tuesday's series opener against the Angels at Oriole Park at Camden Yards. The slugger was sent home for the day.

"He was sick all day yesterday and didn't seem to be making a marked improvement," O's manager Buck Showalter said. "It's infectious, and I didn't want him to pass it around the clubhouse."

Davis was nauseous and vomiting after the team's West Coast trip, Showalter said, so head athletic trainer Richie Bancells sent him home to avoid the illness from spreading.

"That's one of the things about traveling all over the country," Showalter said. "I hope it's an isolated case. We'll see."

Steve Pearce is filling in for Davis at first base, with outfielder Delmon Young serving as the designated hitter and batting in Davis' usual No. 5 spot.

Showalter didn't totally rule out the possibility that Davis could serve as a pinch-hitter, though. The first baseman was told to go home and drink fluids, and if he feels better later in the evening, he could return to the stadium.

Ubaldo turns in successful first rehab outing

BALTIMORE -- Ubaldo Jimenez made his first rehab start for Class A short-season Aberdeen on Tuesday, going 4 2/3 innings. The Orioles' right-hander could make another start for a higher affiliate next week as he continues to work his way back from a right ankle injury.

Jimenez allowed one unearned run on five hits and three walks, along with a wild pitch. He also struck out three.

Manager Buck Showalter wouldn't commit before Tuesday's game whether Jimenez would need a second outing, but given how well the rotation has pitched it's very likely. Jimenez also hasn't appeared in a game for the Orioles since July 5. He went 3-8 with a 4.52 ERA in 18 games in the first half and will pose a roster crunch for the O's, who have five starters that have pitched well as of late.

Worth noting

Matt Wieters was at Camden Yards on Tuesday and has had the immobilizer removed from his right arm. The catcher is expected to travel with the Orioles for the remainder of the season.

• The Orioles have signed 20-year-old third baseman Gionel Santa out of the Dominican Republic. The right-handed hitter is listed at 6-foot-2 and 195 pounds. He signed with Toronto last year, but he was suspended due to an issue with his birth certificate and became eligible again this year. Santa is one of several players who executive vice president of baseball operations Dan Duquette saw on his trip to the Dominican Republic last week, with the O's passing on several others that they were considering last week.

Baltimore was among those with representatives on hand for Cuban free-agent outfielder Rusney Castillo, but the club isn't expected to get into the bidding war that he figures to command.

Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. David Wilson is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.