BALTIMORE -- Orioles infielder Mark Reynolds was back in the starting lineup on Wednesday, one night after committing a key error that led to a three-run sixth inning for the Yankees in Baltimore's 5-4, 12-inning loss.

"We had plenty of opportunities in the game last night to not make that play matter -- that's why you call it a team game -- but I understand where the point of emphasis is because of some of the challenges he had last year," manager Buck Showalter said of Reynolds, who committed 26 errors at third base in 2011. "Mark and I talked [on Wednesday afternoon]. ... I just thought it was important for him to get right back on the horse."

Cognizant of his deficiencies in the field, Reynolds made an effort to improve his defense this season, shedding 20 pounds to aid with his mobility and constantly coming out for early work with infield coaches Bobby Dickerson and Mike Bordick during Spring Training.

"It's frustrating knowing how much effort and work I've put in, and still these results are coming," said Reynolds, who made two errors in the Orioles' first five games this season. "But it's definitely not for lack of effort, lack of work. I'll just keep plugging away. [It's] all I can do."

"That's part of the reason why he is in there [Wednesday]," Showalter said. "This is a guy that has put in probably as much hard work as anybody on our club during the offseason, and it's kind of frustrating for us not to see him not get a return for it. Sometimes, you can want something too much."

Furthering the issue is the fact that Reynolds has also struggled at the plate; he entered Wednesday's series finale with the Yankees batting .143 with no homers or RBIs. While he started slowly last year and still ended up with 37 homers and 86 RBIs, Reynolds has seen his lack of offense put his defense in an even harsher light.

Orioles sign Pineiro to Minor League deal

BALTIMORE -- The Orioles signed right-hander Joel Pineiro to a Minor League deal on Wednesday, in a continuing effort to add depth to the organization.

The 33-year-old Pineiro, who arrived at Baltimore's Minor League complex in Sarasota, Fla., on Wednesday, was signed by the Phillies in January but released a few days into Spring Training, and the Orioles could use him as a starter or potentially as a long man in the bullpen.

Baltimore does not currently have a long man in its bullpen.

Pineiro went 7-7 with a 5.13 ERA for the Angels last season and is expected to be assigned to Triple-A Norfolk.

Tidbits

• The Orioles' rotation will stay on turn the second time through, with right-hander Tommy Hunter set to face the Blue Jays in Toronto on Friday, ahead of Jason Hammel and Brian Matusz on Saturday and Sunday, respectively. Showalter wanted to make sure Hunter got through his workday on Tuesday before making any decisions.

Jake Arrieta will open a set with the White Sox in Chicago on Monday night, and Wei-Yin Chen, who made his Major League debut on Tuesday, will next pitch on April 17.

• Right-hander Dylan Bundy -- the Orioles' second-best prospect and the No. 10 prospect in baseball, according to MLB.com -- pitched three perfect innings in his second pro start for Class A Delmarva on Wednesday night. The 19-year-old Bundy recorded six strikeouts, including five consecutively, and has struck out 12 in six scoreless innings since making his debut.