Davis, who believes he first injured his oblique while diving for a ball against the Boston Red Sox at Fenway Park in mid-April, was back in the Orioles lineup Sunday on the first day he was eligible to return. He had a single, a double and two strikeouts in four at-bats.

“Felt good. Timing is a little off,” Davis said. “But it was definitely good to be in there, moving around again. Going to take a little bit of time.”

Davis played in just one minor league rehab game — he was 1-for-4 with two strikeouts on Saturday at Double-A Bowie — and he said he felt no pain or discomfort in his side.

In his first 22 games before going on the DL, Davis hit .250 with two homers and 13 RBIs in 76 at-bats.

The Orioles could use Davis’ power in the lineup, especially given Wieters’ injury, but Showalter said the club activated Davis on Sunday because it felt he was ready to contribute.

“Chris was OK,” Showalter said. “He had a couple of hits for us. Felt good physically. I checked with him one time during the game. It was good to get his presence back in the lineup.”

Showalter said he talked with his slugger and head athletic trainer Richie Bancells, and it was agreed that Davis’ pain had subsided and he should be fine going forward.

“[Bancells] goes, ‘No. This is a baseball decision now and not a medical decision.’ A lot like Manny [Machado],” Showalter said. “If it was a full-fledged intercostal-oblique [strain] then this would be a little short. But I’m hoping we caught it a little earlier than most.”

Before the game, Davis said he felt fine after the game Saturday in Bowie. He played nine innings, scored a run and struck out twice.

“I don't have any pain or discomfort. I don't have any stiffness, which I was kind of wondering whether I was going to be tight or stiff or anything like that,” Davis said.

Around the horn

Sunday was the Orioles’ second sellout of the year at Camden Yards. The first was Opening Day. … The Orioles are now 1-5 on Sundays this season, losing their last five after winning their first Sunday game in Detroit. … Orioles players and staff wore pink armbands, arm sleeves and cleats and swung pink bats in honor of Mother’s Day and breast cancer awareness. … Left-hander Johan Santana threw 2 1/3 innings in an extended spring training game against Tampa Bay Rays minor leaguers Saturday. Santana allowed two earned runs, three hits and three walks while striking out three. He threw 51 pitches, but his outing was cut short because of mound issues at the Rays’ complex.